Version 52.0.2743.0 dev (64-bit)
Platform 8350.2.0 (Official Build) dev-channel link
Firmware Google_Link.2695.1.169

What steps will reproduce the problem?
(1) Go to https://googlechrome.github.io/samples/web-bluetooth/device-disconnect.html
(2) Enter nearby BLE device name, click "Scan" button
(3) Select device in BT chooser, click "Pair" button

What is the expected output?
Device should be connected

What do you see instead?
It is not.

Here are my logs:

[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(430)] requestDevice called with the following filters: 
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(432)] Name: 
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(433)] Name Prefix: PL
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(434)] Services:
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(435)] 	[
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(438)] 	]
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(441)] requestDevice called with the following optional services: 
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(568)] Populating 2 devices in chooser 12
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(571)] 	7C:35:FE:85:B5:7F
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(571)] 	6C:86:2A:7B:49:63
[7489:7489:0527/114718:VERBOSE1:bluetooth_adapter_bluez.cc(1251)] AddDiscoverySession
[7489:7489:0527/114718:VERBOSE1:bluetooth_adapter_bluez.cc(1547)] OnSetDiscoveryFilter
[7489:7489:0527/114718:VERBOSE1:bluetooth_adapter_bluez.cc(1432)] OnStartDiscovery
[7489:7489:0527/114718:VERBOSE1:bluetooth_adapter.cc(280)] BluetoothAdapter::OnStartDiscoverySession
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(593)] Started discovery session for 12
[7489:7489:0527/114718:VERBOSE1:bluetooth_adapter_bluez.cc(976)] Discovering changed: 1
[7489:7489:0527/114718:VERBOSE2:bluetooth_device_bluez.cc(637)] Gatt services have not been fully resolved for device /org/bluez/hci0/dev_CA_54_48_65_A6_45
[7489:7489:0527/114718:WARNING:arc_bluetooth_bridge.cc(683)] no Bluetooth instance available
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(363)] Adding device to all choosers: CA:54:48:65:A6:45
[7489:7489:0527/114718:VERBOSE2:bluetooth_device_bluez.cc(637)] Gatt services have not been fully resolved for device /org/bluez/hci0/dev_AC_E6_4B_05_88_2D
[7489:7489:0527/114718:WARNING:arc_bluetooth_bridge.cc(683)] no Bluetooth instance available
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(363)] Adding device to all choosers: AC:E6:4B:05:88:2D
[7489:7489:0527/114718:VERBOSE2:bluetooth_device_bluez.cc(637)] Gatt services have not been fully resolved for device /org/bluez/hci0/dev_67_ED_FC_BB_3C_6F
[7489:7489:0527/114718:WARNING:arc_bluetooth_bridge.cc(683)] no Bluetooth instance available
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(363)] Adding device to all choosers: 67:ED:FC:BB:3C:6F
[7489:7489:0527/114718:VERBOSE2:bluetooth_device_bluez.cc(637)] Gatt services have not been fully resolved for device /org/bluez/hci0/dev_5A_E6_28_FE_D6_38
[7489:7489:0527/114718:WARNING:arc_bluetooth_bridge.cc(683)] no Bluetooth instance available
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(363)] Adding device to all choosers: 5A:E6:28:FE:D6:38
[7489:7489:0527/114718:VERBOSE2:bluetooth_device_bluez.cc(637)] Gatt services have not been fully resolved for device /org/bluez/hci0/dev_FB_1F_30_C2_94_EA
[7489:7489:0527/114718:WARNING:arc_bluetooth_bridge.cc(683)] no Bluetooth instance available
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(363)] Adding device to all choosers: FB:1F:30:C2:94:EA
[7489:7489:0527/114718:VERBOSE2:bluetooth_device_bluez.cc(637)] Gatt services have not been fully resolved for device /org/bluez/hci0/dev_C3_65_2E_68_4B_9E
[7489:7489:0527/114718:WARNING:arc_bluetooth_bridge.cc(683)] no Bluetooth instance available
[7489:7489:0527/114718:VERBOSE1:bluetooth_dispatcher_host.cc(363)] Adding device to all choosers: C3:65:2E:68:4B:9E
[7489:7489:0527/114720:VERBOSE1:bluetooth_allowed_devices_map.cc(47)] Adding a device to Map of Allowed Devices.
[7489:7489:0527/114720:VERBOSE1:bluetooth_allowed_devices_map.cc(62)] Device already in map of allowed devices.
[7489:7489:0527/114720:VERBOSE1:bluetooth_dispatcher_host.cc(713)] Device: PLAYBULB Candle
[7489:7489:0527/114720:VERBOSE1:bluetooth_dispatcher_host.cc(714)] UUIDs: 
[7489:7489:0527/114720:VERBOSE1:bluetooth_dispatcher_host.cc(723)] 	 Not Allowed: 0000ff02-0000-1000-8000-00805f9b34fb
[7489:7489:0527/114720:VERBOSE1:bluetooth_discovery_session.cc(45)] Stopping device discovery session.
[7489:7489:0527/114720:VERBOSE1:bluetooth_adapter_bluez.cc(1314)] RemoveDiscoverySession
[7489:7489:0527/114720:VERBOSE1:bluetooth_adapter_bluez.cc(1479)] OnStopDiscovery
[7489:7489:0527/114720:VERBOSE1:bluetooth_adapter_bluez.cc(976)] Discovering changed: 0

For info, I use BlueZ 5.39 with https://chromium.googlesource.com/chromiumos/third_party/bluez/+/2a2e7102cd86ec3c28cc2b7e003ba8deb07f4731 reverted as advised in  Issue 614903 .