don't knwo if it could be a bug but I have bluetooth set to on and do a dive simulation with simulator. When I quit the simulator, then bluetooth is automatically set to off. Tried this several times and it happened every time.
bluetooth is turned off in dive mode. As the simulator is like a dive it disables the bluetooth. The same is true after a dive.
The automatic enable bluetooth is meant to be a help to use bluetooth straight after turning on the unit without further activity.
Bluetooth can be easily actived again directly after a dive in the menu.