UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:59.0) Gecko/20100101 Firefox/59.0

Example URL:
https://amba.online/videocall

Steps to reproduce the problem:
1. login as a Member to https://amba.online (I can supply credentials for this test)
2. Make a video call to another member (uses WebRTC)
3.

What is the expected behavior?
The Ringtone should repeat continuously until the other party accepts the call or the call is declined or times out (about 2mins)

What went wrong?
The Ringtone plays exactly ONCE on Chromium 65.0.3325.181 on Windows 7, Windows 10, MacOS

Did this work before? Yes It was working a month ago. Exact version(s) unknown

Is it a problem with Flash or HTML5? HTML5

Does this work in other browsers? Yes

Chrome version: <Copy from: 'about:version'>  Channel: n/a
OS Version: OS X 10.11
Flash Version: Shockwave Flash 28.0 r0

Contents of chrome://gpu: 
Mac:

Graphics Feature Status
Canvas: Software only, hardware acceleration unavailable
CheckerImaging: Disabled
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Enabled
Native GpuMemoryBuffers: Hardware accelerated
Rasterization: Unavailable
Video Decode: Hardware accelerated
WebGL: Hardware accelerated
WebGL2: Hardware accelerated
Driver Bug Workarounds
add_and_true_to_loop_condition
adjust_src_dst_region_for_blitframebuffer
avoid_stencil_buffers
decode_encode_srgb_for_generatemipmap
disable_framebuffer_cmaa
disable_webgl_rgb_multisampling_usage
dont_use_loops_to_initialize_variables
emulate_abs_int_function
get_frag_data_info_bug
init_one_cube_map_level_before_copyteximage
max_msaa_sample_count_4
msaa_is_slow
pack_parameters_workaround_with_pack_buffer
rebind_transform_feedback_before_resume
regenerate_struct_names
remove_invariant_and_centroid_for_essl3
reset_base_mipmap_level_before_texstorage
rewrite_float_unary_minus_operator
rewrite_texelfetchoffset_to_texelfetch
scalarize_vec_and_mat_constructor_args
set_zero_level_before_generating_mipmap
swizzle_rgba_for_async_readpixels
unfold_short_circuit_as_ternary_operation
unpack_alignment_workaround_with_unpack_buffer
unpack_image_height_workaround_with_unpack_buffer
use_intermediary_for_copy_texture_image
use_shadowed_tex_level_params
use_unused_standard_shared_blocks
Problems Detected
Rendering artifacts on older macOS releases and Intel GPUs: 794819
Disabled Features: accelerated_2d_canvas, gpu_rasterization
Async Readpixels with GL_BGRA format is broken on Haswell chipset on Macs: 265115
Applied Workarounds: swizzle_rgba_for_async_readpixels
Unfold short circuit on Mac OS X: 307751
Applied Workarounds: unfold_short_circuit_as_ternary_operation
Always rewrite vec/mat constructors to be consistent: 398694
Applied Workarounds: scalarize_vec_and_mat_constructor_args
Mac drivers handle struct scopes incorrectly: 403957
Applied Workarounds: regenerate_struct_names
On Intel GPUs MSAA performance is not acceptable for GPU rasterization: 527565
Applied Workarounds: msaa_is_slow
glGenerateMipmap fails if the zero texture level is not set on some Mac drivers: 560499
Applied Workarounds: set_zero_level_before_generating_mipmap
Pack parameters work incorrectly with pack buffer bound: 563714
Applied Workarounds: pack_parameters_workaround_with_pack_buffer
Alignment works incorrectly with unpack buffer bound: 563714
Applied Workarounds: unpack_alignment_workaround_with_unpack_buffer
copyTexImage2D fails when reading from IOSurface on multiple GPU types.: 581777
Applied Workarounds: use_intermediary_for_copy_texture_image
Multisample renderbuffers with format GL_RGB8 have performance issues on Intel GPUs.: 607130
Applied Workarounds: disable_webgl_rgb_multisampling_usage
Mac Drivers store texture level parameters on int16_t that overflow: 610153
Applied Workarounds: use_shadowed_tex_level_params
Use GL_INTEL_framebuffer_CMAA on ChromeOS: 535198
Applied Workarounds: disable_framebuffer_cmaa
glGetFragData{Location|Index} works incorrectly on Max: 638340
Applied Workarounds: get_frag_data_info_bug
glResumeTransformFeedback works incorrectly on Intel GPUs: 638514
Applied Workarounds: rebind_transform_feedback_before_resume
glTexStorage* are buggy when base mipmap level is not 0: 640506
Applied Workarounds: reset_base_mipmap_level_before_texstorage
Result of abs(i) where i is an integer in vertex shader is wrong: 642227
Applied Workarounds: emulate_abs_int_function
Rewrite texelFetchOffset to texelFetch for Intel Mac: 642605
Applied Workarounds: rewrite_texelfetchoffset_to_texelfetch
Rewrite condition in for and while loops for Intel Mac: 644669
Applied Workarounds: add_and_true_to_loop_condition
Do TexImage2D first before CopyTexImage2D for cube map texture on Intel Mac 10.11: 648197
Applied Workarounds: init_one_cube_map_level_before_copyteximage
Decode and encode before generateMipmap for srgb format textures on macosx: 634519
Applied Workarounds: decode_encode_srgb_for_generatemipmap
Insert statements to reference all members in unused std140/shared blocks on Mac: 618464
Applied Workarounds: use_unused_standard_shared_blocks
Tex(Sub)Image3D performs incorrectly when uploading from unpack buffer with GL_UNPACK_IMAGE_HEIGHT greater than zero on Intel Macs: 654258
Applied Workarounds: unpack_image_height_workaround_with_unpack_buffer
adjust src/dst region if blitting pixels outside read framebuffer on Mac: 644740
Applied Workarounds: adjust_src_dst_region_for_blitframebuffer
Mac driver GL 4.1 requires invariant and centroid to match between shaders: 639760, 641129
Applied Workarounds: remove_invariant_and_centroid_for_essl3
Disable KHR_blend_equation_advanced until cc shaders are updated: 661715
Applied Workarounds: disable(GL_KHR_blend_equation_advanced), disable(GL_KHR_blend_equation_advanced_coherent)
Rewrite -float to 0.0 - float for Intel Mac: 672380
Applied Workarounds: rewrite_float_unary_minus_operator
Certain Apple devices leak stencil buffers: 713854
Applied Workarounds: avoid_stencil_buffers
Don't expose disjoint_timer_query extensions to WebGL: 808744
Shader variable initialization in a loop caused perf regression on Mac Intel.: 809422
Applied Workarounds: dont_use_loops_to_initialize_variables
8x MSAA is slow for alpha:false WebGL contexts on Mac Intel: 812071
Applied Workarounds: max_msaa_sample_count_4
Checker-imaging has been disabled via finch trial or the command line.
Disabled Features: checker_imaging
Version Information
Data exported	2018-04-11T14:34:33.179Z
Chrome version	Chrome/65.0.3325.181
Operating system	Mac OS X 10.11.6
Software rendering list URL	https://chromium.googlesource.com/chromium/src/+/dc3469be277cc962ba01d9c0cb5bb1a265676c36/gpu/config/software_rendering_list.json
Driver bug list URL	https://chromium.googlesource.com/chromium/src/+/dc3469be277cc962ba01d9c0cb5bb1a265676c36/gpu/config/gpu_driver_bug_list.json
ANGLE commit id	2c9cc8b6e810
2D graphics backend	Skia/65 8a3e0b31927ae78bc3e9c342b1290a6a64233674-
Command Line	/Applications/Google Chrome.app/Contents/MacOS/Google Chrome --flag-switches-begin --flag-switches-end
Driver Information
Initialization time	56
In-process GPU	false
Passthrough Command Decoder	false
Direct Composition	false
Supports overlays	false
Sandboxed	true
GPU0	VENDOR = 0x8086, DEVICE= 0x0a26 *ACTIVE*
Optimus	false
Optimus	false
AMD switchable	false
Driver vendor	
Driver version	10.14.73
Driver date	
Pixel shader version	4.10
Vertex shader version	4.10
Max. MSAA samples	8
Machine model name	MacBookAir
Machine model version	6.2
GL_VENDOR	Intel Inc.
GL_RENDERER	Intel HD Graphics 5000 OpenGL Engine
GL_VERSION	4.1 INTEL-10.14.73
GL_EXTENSIONS	GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier
Disabled Extensions	GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent
Disabled WebGL Extensions	EXT_disjoint_timer_query EXT_disjoint_timer_query_webgl2
Window system binding vendor	
Window system binding version	
Window system binding extensions	
Direct rendering	Yes
Reset notification strategy	0x0000
GPU process crash count	0
Compositor Information
Tile Update Mode	Zero-copy
Partial Raster	Enabled
GpuMemoryBuffers Status
ATC	Software only
ATCIA	Software only
DXT1	Software only
DXT5	Software only
ETC1	Software only
R_8	GPU_READ, SCANOUT, GPU_READ_CPU_READ_WRITE, GPU_READ_CPU_READ_WRITE_PERSISTENT
R_16	Software only
RG_88	Software only
BGR_565	Software only
RGBA_4444	Software only
RGBX_8888	Software only
RGBA_8888	GPU_READ, SCANOUT, SCANOUT_CPU_READ_WRITE
BGRX_8888	GPU_READ, SCANOUT, SCANOUT_CPU_READ_WRITE
BGRX_1010102	Software only
BGRA_8888	GPU_READ, SCANOUT, SCANOUT_CPU_READ_WRITE, GPU_READ_CPU_READ_WRITE, GPU_READ_CPU_READ_WRITE_PERSISTENT
RGBA_F16	GPU_READ, SCANOUT, GPU_READ_CPU_READ_WRITE, GPU_READ_CPU_READ_WRITE_PERSISTENT
YVU_420	Software only
YUV_420_BIPLANAR	GPU_READ, SCANOUT, GPU_READ_CPU_READ_WRITE, GPU_READ_CPU_READ_WRITE_PERSISTENT
UYVY_422	GPU_READ, SCANOUT, GPU_READ_CPU_READ_WRITE, GPU_READ_CPU_READ_WRITE_PERSISTENT
Display(s) Information
Info	Display[69679040] bounds=0,0 1440x900, workarea=0,23 1440x826, scale=1, external
Color space information	{primaries:[[0.3806,0.4340,0.1496,],[0.2195,0.6820,0.0985,],[0.0401,0.0883,0.6966,],], transfer:0.0774*x + 0.0000 if x < 0.0404 else (0.9479*x + 0.0521)**2.4000 + 0.0000, matrix:RGB, range:FULL}
Bits per color component	8
Bits per pixel	24
Video Acceleration Information
Decode h264 baseline	up to 4096x2160 pixels
Decode h264 extended	up to 4096x2160 pixels
Decode h264 main	up to 4096x2160 pixels
Decode h264 high	up to 4096x2160 pixels
Encode h264 baseline	up to 4096x2160 pixels and/or 30.000 fps
Encode h264 main	up to 4096x2160 pixels and/or 30.000 fps
Encode h264 high	up to 4096x2160 pixels and/or 30.000 fps

Windows

Graphics Feature Status

    Canvas: Hardware accelerated
    CheckerImaging: Disabled
    Flash: Hardware accelerated
    Flash Stage3D: Hardware accelerated
    Flash Stage3D Baseline profile: Hardware accelerated
    Compositing: Hardware accelerated
    Multiple Raster Threads: Enabled
    Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
    Rasterization: Unavailable
    Video Decode: Hardware accelerated
    WebGL: Hardware accelerated
    WebGL2: Unavailable

Driver Bug Workarounds

    clear_uniforms_before_first_program_use
    decode_encode_srgb_for_generatemipmap
    disable_accelerated_vpx_decode
    disable_d3d11
    disable_discard_framebuffer
    disable_framebuffer_cmaa
    disable_larger_than_screen_overlays
    exit_on_context_lost
    force_cube_complete
    msaa_is_slow
    scalarize_vec_and_mat_constructor_args
    texsubimage_faster_than_teximage

Problems Detected

    GPU rasterization should only be enabled on NVIDIA and Intel DX11+, and AMD RX-R2 GPUs for now.: 643850
    Disabled Features: gpu_rasterization
    Disable D3D11/WebGL2 on AMD switchable graphics: 451420, 755722
    Disabled Features: accelerated_webgl2
    Some drivers are unable to reset the D3D device in the GPU process sandbox
    Applied Workarounds: exit_on_context_lost
    TexSubImage is faster for full uploads on ANGLE
    Applied Workarounds: texsubimage_faster_than_teximage
    Clear uniforms before first program use on all platforms: 124764, 349137
    Applied Workarounds: clear_uniforms_before_first_program_use
    Always rewrite vec/mat constructors to be consistent: 398694
    Applied Workarounds: scalarize_vec_and_mat_constructor_args
    Disable Direct3D11 on systems with AMD switchable graphics: 451420, 755722
    Applied Workarounds: disable_d3d11
    ANGLE crash on glReadPixels from incomplete cube map texture: 518889
    Applied Workarounds: force_cube_complete
    On Intel GPUs MSAA performance is not acceptable for GPU rasterization: 527565
    Applied Workarounds: msaa_is_slow
    Framebuffer discarding can hurt performance on non-tilers: 570897
    Applied Workarounds: disable_discard_framebuffer
    Use GL_INTEL_framebuffer_CMAA on ChromeOS: 535198
    Applied Workarounds: disable_framebuffer_cmaa
    Disable KHR_blend_equation_advanced until cc shaders are updated: 661715
    Applied Workarounds: disable(GL_KHR_blend_equation_advanced), disable(GL_KHR_blend_equation_advanced_coherent)
    Decode and Encode before generateMipmap for srgb format textures on Windows: 634519
    Applied Workarounds: decode_encode_srgb_for_generatemipmap
    Accelerated VPx decoding is hanging on some videos.: 654111
    Applied Workarounds: disable_accelerated_vpx_decode
    Overlay sizes bigger than screen aren't accelerated on some Intel drivers: 720059
    Applied Workarounds: disable_larger_than_screen_overlays
    Don't expose disjoint_timer_query extensions to WebGL: 808744
    Native GpuMemoryBuffers have been disabled, either via about:flags or command line.
    Disabled Features: native_gpu_memory_buffers
    Checker-imaging has been disabled via finch trial or the command line.
    Disabled Features: checker_imaging

Version Information

Data exported

2018-04-11T14:36:28.312Z

Chrome version

Chrome/65.0.3325.181

Operating system

Windows NT 10.0.16299

Software rendering list URL

https://chromium.googlesource.com/chromium/src/+/dc3469be277cc962ba01d9c0cb5bb1a265676c36/gpu/config/software_rendering_list.json

Driver bug list URL

https://chromium.googlesource.com/chromium/src/+/dc3469be277cc962ba01d9c0cb5bb1a265676c36/gpu/config/gpu_driver_bug_list.json

ANGLE commit id

2c9cc8b6e810

2D graphics backend

Skia/65 8a3e0b31927ae78bc3e9c342b1290a6a64233674-

Command Line

"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --flag-switches-begin --flag-switches-end
Driver Information

Initialization time

627

In-process GPU

false

Passthrough Command Decoder

false

Direct Composition

false

Supports overlays

false

Sandboxed

false

GPU0

VENDOR = 0x1002, DEVICE= 0x6823

GPU1

VENDOR = 0x8086, DEVICE= 0x0416 *ACTIVE*

Optimus

false

Optimus

false

AMD switchable

true

Desktop compositing

Aero Glass

Diagonal Monitor Size of \\.\DISPLAY1

17.2"

Driver vendor

Advanced Micro Devices, Inc.

Driver version

15.201.1101.0

Driver date

8-6-2015

Pixel shader version

3.0

Vertex shader version

3.0

Max. MSAA samples

8

Machine model name

Machine model version

GL_VENDOR

Google Inc.

GL_RENDERER

ANGLE (Intel(R) HD Graphics 4600 Direct3D9Ex vs_3_0 ps_3_0)

GL_VERSION

OpenGL ES 2.0 (ANGLE 2.1.0.2c9cc8b6e810)

GL_EXTENSIONS

GL_ANGLE_client_arrays GL_ANGLE_depth_texture GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_pack_reverse_row_order GL_ANGLE_program_cache_control GL_ANGLE_request_extension GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_CHROMIUM_bind_generates_resource GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_color_buffer_float_rgb GL_CHROMIUM_color_buffer_float_rgba GL_CHROMIUM_copy_texture GL_CHROMIUM_sync_query GL_EXT_blend_minmax GL_EXT_color_buffer_half_float GL_EXT_debug_marker GL_EXT_frag_depth GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_shader_texture_lod GL_EXT_texture_compression_dxt1 GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_storage GL_EXT_unpack_subimage GL_KHR_debug GL_NV_fence GL_NV_pack_subimage GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_depth32 GL_OES_element_index_uint GL_OES_get_program_binary GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_surfaceless_context GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_array_object

Disabled Extensions

GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent

Disabled WebGL Extensions

EXT_disjoint_timer_query EXT_disjoint_timer_query_webgl2

Window system binding vendor

Google Inc. (adapter LUID: 00000000000118cf)

Window system binding version

1.4 (ANGLE 2.1.0.2c9cc8b6e810)

Window system binding extensions

EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_EXT_pixel_format_float EGL_KHR_surfaceless_context EGL_ANGLE_display_texture_share_group EGL_ANGLE_create_context_client_arrays EGL_ANGLE_program_cache_control EGL_ANGLE_robust_resource_initialization

Direct rendering

Yes

Reset notification strategy

0x8252

GPU process crash count

0
Compositor Information

Tile Update Mode

One-copy

Partial Raster

Enabled
GpuMemoryBuffers Status

ATC

Software only

ATCIA

Software only

DXT1

Software only

DXT5

Software only

ETC1

Software only

R_8

Software only

R_16

Software only

RG_88

Software only

BGR_565

Software only

RGBA_4444

Software only

RGBX_8888

GPU_READ, SCANOUT

RGBA_8888

GPU_READ, SCANOUT

BGRX_8888

Software only

BGRX_1010102

Software only

BGRA_8888

Software only

RGBA_F16

Software only

YVU_420

Software only

YUV_420_BIPLANAR

Software only

UYVY_422

Software only
Display(s) Information

Info

Display[2528732444] bounds=0,0 1920x1080, workarea=0,0 1920x1040, scale=1, external

Color space information

{primaries:BT709, transfer:IEC61966_2_1, matrix:RGB, range:FULL}

Bits per color component

8

Bits per pixel

24
Video Acceleration Information

Decode h264 baseline

up to 1920x1088 pixels

Decode h264 main

up to 1920x1088 pixels

Decode h264 high

up to 1920x1088 pixels

Encode h264 baseline

up to 3840x2176 pixels and/or 30.000 fps

Encode h264 main

up to 3840x2176 pixels and/or 30.000 fps

Encode h264 high

up to 3840x2176 pixels and/or 30.000 fps
Diagnostics

0

b3DAccelerationEnabled

true

b3DAccelerationExists

true

bAGPEnabled

true

bAGPExistenceValid

true

bAGPExists

true

bCanRenderWindow

true

bDDAccelerationEnabled

true

bDriverBeta

false

bDriverDebug

false

bDriverSigned

false

bDriverSignedValid

false

bNoHardware

false

dwBpp

32

dwDDIVersion

12

dwHeight

1080

dwRefreshRate

60

dwWHQLLevel

0

dwWidth

1920

iAdapter

0

lDriverSize

39863920

lMiniVddSize

0

szAGPStatusEnglish

Enabled

szAGPStatusLocalized

Enabled

szChipType

Intel(R) HD Graphics Family

szD3DStatusEnglish

Enabled

szD3DStatusLocalized

Enabled

szDACType

Internal

szDDIVersionEnglish

12

szDDIVersionLocalized

12

szDDStatusEnglish

Enabled

szDDStatusLocalized

Enabled

szDXVAHDEnglish

Supported

szDXVAModes

ModeMPEG2_A ModeMPEG2_C ModeWMV9_C ModeVC1_C

szDescription

Intel(R) HD Graphics 4600

szDeviceId

0x0416

szDeviceIdentifier

{D7B78E66-4756-11CF-0C63-3AD9BAC2D935}

szDeviceName

The Ringtone should loop. It works correctly on Firefox (our build targets are FF and Chrome - we are not working with IE, Edge or Safari due to UNRELATED WebRTC support issues)

This appears to be a very similar behavior to this report https://bugs.chromium.org/p/chromium/issues/detail?id=457099

On request I can supply credentials to login to our system
Contact me at olivers@senecto.com