There are two problems in your logs that might be relevant:
1. Timeouts:
[1666806.664899] Bluetooth: hci0: command 0x200c tx timeout
[1666808.680839] Bluetooth: hci0: command 0x0401 tx timeout
2. BlueZ crashed:
[1666867.068257] bluetoothd[9515]: segfault at 0 ip 0000556e0bc36576 sp
00007fff1afb5c40 error 4 in bluetoothd[556e0bbcd000+f3000]
But since this bug is a couple of years old already, please tell us if
you still experience it.
** Changed in: pulseaudio (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1789758
Title:
bluetooth headphones a2dp profile does not function after suspend,
only HSP
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