[3.4.0 onwards] Bluetooth turning on doesn't work

I made the following observation on Koli (4.0.1.48, Xperia X):

Starting point:
Bluetooth turns on normally on a freshly booted phone.
Connecting to a Bluetooth device works, automatically as well.

  1. Turn BT off
  2. Turn BT on again - takes longer than usual (a few seconds)
  3. Connecting is not working anymore
  4. Turn BT off
  5. Try turning it on: Won’t work. Top Menu button stays gray, radio button in setting keeps blinking.
  6. Reboot the phone: Bluetooth is turned on automatically

The cycle repeats…

Does anyone have a hint on how to collect the right logs?

edit:
@jovirkku: I’m being blunt and ping you directly. Could you comment on this?
Can we do anything to help debugging?

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