I have a brand new raspberry pi 3 B. I have tried to connect a Bluetooth mouse/keyboard combo, as well as a Bluetooth game controller. It doesn’t matter which device I connect (via OSMC), it only stays connected for 20-30 seconds.
I’ve searched through every forum post I could find related to Bluetooth. Most entries are two year old threads with no helpful information. I’m sure there is a solution, its just not searchable in the forums.