I find the same issue today, if select is defined like hotkey in some mame games don't insert coins... In all the older version it worked perfectly... I come back to previous version because in my cabinet I have no more buttons to setup. Let's wait for another update with a solution.

@Substring i have good news, today ive been in fnac and finded Trust mini dongle for 8€, and works perfectly!!! In 10 seconds are the four controllers conected!!! Now we know that a dongle can work dont significate that cannot can have problems... Thanks for your opinions and help!!

@Substring i was thinking about to buy a new BT dongle because mine is not in list, but if it recognise and pair must not be a dongle problem itsn? I guess is something in the confif....What to you think to spend money on a new BT?

@Substring i tried your trick, sometimes is imposible, and other times he can conect but between 7- 10 minutes after turno the system on.... Any idea???

@Substring ill try it when arrive at home... I hope your trick works... Later i post the resultado. Thanks mate

Hi mates¡¡¡ i received yesterday 4 units 8bitdo Zero, i pair all them and works nice.
the problem arrive when i restart the system or turn off the controller, they dont connect again and have to pair them again.

ive checked in recalbox/share/bluetooth and they are registered...
hope somebody can help me¡ thanks