I’m not sure if it’s the exact same issue, but I have the feeling that it is strongly related.
My Observations:
Pair with 2 BT sources.
Turn on headphones while in range of both - they should both auto-connect.
Disable one of the sources or walk out of range - you’ll hear the disconnect event being announced by the headphones.
Either stay out of range or keep BT disabled for some time - 10 to 30 minutes seem like the reasonable interval for this to happen. Important: If you come back into range or turn BT back on right away, this problem won’t happen and reconnect will work!
Come back into range or turn BT back on.
Auto-connect will not work and I cannot manually connect to the headphones either. It will simply time out. Only a restart of the headphones will make them connect again.