jan 11 11:59:05 omer kernel: Bluetooth: hci0: Received unexpected HCI Event 
00000000
jan 11 11:59:05 omer kernel: Bluetooth: hci0: Received unexpected HCI Event 
00000000
jan 11 11:59:05 omer kernel: Bluetooth: hci0: Received unexpected HCI Event 
00000000
jan 11 11:59:05 omer kernel: Bluetooth: hci0: Received unexpected HCI Event 
00000000
jan 11 11:59:47 omer bluetoothd[13716]: Suspend: Connection timed out (110)
jan 11 11:59:47 omer kernel: Bluetooth: hci0: Received unexpected HCI Event 
00000000

Looks like a firmware issue and bug 1905214 updated firmware
intel/ibt-20-1-3.sfi to REL13705 in Focal while it remains REL0310 in
Bionic.

Could you try download following two files and place them in 
/lib/firmware/intel. They are the firmware blobs currently used in Focal. 
Backup first of course.
* 
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux-firmware/plain/intel/ibt-20-1-3.ddc?h=focal
* 
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux-firmware/plain/intel/ibt-20-1-3.sfi?h=focal

Upstream linux-firmware has even newer revisions. Please try following two if 
Focal's still don't resolve your problem:
* 
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/intel/ibt-20-1-3.ddc
* 
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/intel/ibt-20-1-3.sfi

** Tags added: hwe-bluetooth

** Summary changed:

- bluetoothd hangs and cannot be killed
+ Intel Bluetooth AX200 [8086:2723] Subsystem [1a56:1653]: bluetoothd hangs and 
cannot be killed

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https://bugs.launchpad.net/bugs/1910405

Title:
  Intel Bluetooth AX200 [8086:2723] Subsystem [1a56:1653]: bluetoothd
  hangs and cannot be killed

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