The logs contains of warnings like

[1:52:0507/151923.362641:WARNING:video_receive_stream.cc(468)] No decodable frame in 3000 ms, requesting keyframe.
[1:48:0507/151923.363879:WARNING:rtp_rtcp_impl.cc(205)] Process: Timeout: No increase in RTCP RR extended highest sequence number.

[1:43:0507/151941.992255:WARNING:packet_buffer.cc(97)] Packet buffer flushed
[1:43:0507/151942.049397:WARNING:rtp_sender.cc(689)] Failed resending RTP packet 12225, Discard rest of packets.
[1:48:0507/151942.257455:ERROR:acm_receiver.cc(49)] AcmReceiver::SetExtraDelay 2198
[1:48:0507/151942.257808:ERROR:channel.cc(1391)] SetMinimumPlayoutDelay() failed to set min playout delay
[1:48:0507/151942.257962:WARNING:channel_proxy.cc(287)] Error setting minimum playout delay.
[1:43:0507/151942.403706:WARNING:rtp_sender.cc(689)] Failed resending RTP packet 12285, Discard rest of packets.
[1:43:0507/151942.417966:WARNING:rtp_sender.cc(689)] Failed resending RTP packet 12290, Discard rest of packets.
[1:43:0507/151942.430505:WARNING:rtp_sender.cc(689)] Failed resending RTP packet 12297, Discard rest of packets.
[1:43:0507/151942.489881:WARNING:rtp_sender.cc(689)] Failed resending RTP packet 12305, Discard rest of packets.
[1:43:0507/151942.497436:WARNING:packet_buffer.cc(97)] Packet buffer flushed
[1:43:0507/151942.515807:WARNING:turnport.cc(456)] Socket is bound to the address:192.168.11.45, rather then an address associated with network:Net[arcbr0:100.115.92.x/30:Unknown].

So it looks very much like network issue at some layer.
I think we can remove the Video component from this bug.

@sprang, thanks for checking this quickly! I removed Video component.

@deadbeef@ can you please kindly help check if this is something your team can help? Please feel free to reassign if it's not the case.

Also adding WiFi team to help take a look.  

@agnescheng, do you need me to check something here?

Hi Kirtika,

When the video chat dropped, WiFi is still connected and workable. However, there are network errors in logs (from https://buganizer.corp.google.com/issues/78315388#comment13). 

One kind DUT show  "Connection lost " ,and we can grep error in file Near Accesspoint_second_test/8/debuglog/var/log/chrome/chrome_20180506-175523:
        [1161:1239:0507/145942.138526:WARNING:name_value_pairs_parser.cc(55)] Key block_devmode already has value (error), ignoring new value: 0
        [1161:1161:0507/145945.558152:ERROR:gaia_screen_handler.cc(593)] Gaia webview error: ERR_INTERNET_DISCONNECTED
        [1161:1161:0507/145945.558317:WARNING:signin_screen_handler.cc(785)] Retry frame load due to reason: frame error
        [1161:1161:0507/145945.558598:WARNING:error_screen.cc(193)] Network error screen message is shown
        [1161:1161:0507/145945.575982:WARNING:CONSOLE(294)] "<webview>: The load has aborted with error -106: ERR_INTERNET_DISCONNECTED.", source: extensions::webViewEvents (294)
        [1161:1161:0507/145950.342342:WARNING:error_screen.cc(203)] Network error screen message is hidden
        [1161:1161:0507/145950.619180:WARNING:CONSOLE(294)] "<webview>: The load has aborted with error -20: ERR_BLOCKED_BY_CLIENT.", source: extensions::webViewEvents (294)
        [1:28:0507/151729.591663:ERROR:stunport.cc(279)] Jingle:Port[0x13a03080:audio:1:0:local:Net[mlan0:192.168.11.x/24:Wifi]]: UDP send of 912 bytes failed with error 1

I am not sure which network layer it might be related. So just loop you in as FYI, if these errors doesn't look like kernel level related, please feel free to ignore. Any suggestion is appreciated. Thanks!

I think you mean kirtika@.

I don't have access to the Buganizer bug; can you attach the log to this bug or give me access?

Though from the log messages that have been pasted in comments, it appears that the DUT is being disconnected from the AP and "sendto"s are failing at the OS level.

I've downloaded an uploaded in this drive https://drive.google.com/drive/folders/1_IvFNYr1DvEG67yAJJEh6t1lLR76I97G?usp=sharing all files attached to the bug.
the ones in #comment13 are:
https://drive.google.com/open?id=1M87nwPC0GHEBx_uxk8nC8n0OpEC0VuUb
https://drive.google.com/open?id=18DMuj4esKMzIO0G-T9fiw8GqsbIU-Zng
https://drive.google.com/open?id=1P9LUvvBFTyNuygcpfFguy8ml898bfCjz

This bug has an owner, thus, it's been triaged. Changing status to "assigned".

qq: what would be the expected SLA for fixing this P1 issue (logged in May)?

Hello!
This bug is receiving this notice because there has been no acknowledgment of its existence in quite a bit of time
- If you are currently working on this bug, please provide an update.
- If you are currently affected by this bug, please update with your current symptoms and relevant logs.

If there has been no updates provided by EOD Wednesday, 12/19/18 (5pm EST), this bug will be archived and can be re-opened at any time deemed necessary.

Thank you!

Due to lack of action this bug has been Archived. If work is still being done on this issue or you are still experiencing this issue please feel free to re-open with the appropriate information.