Controller keeps disconnecting in 1.7.3

Hi! So I’m fairly new to RetroArch so please be considerate :smiley:
I didn’t find similar issues on google so I hope someone can help me.

I’m using the 8Bitdo SF30 Pro controller via Bluetooth (dongle) and it keeps disconnecting although the Controller is still connected to my Pc. I tested this by playing some games on Steam - works fine. My wireless Xbox 360 Controller also works just fine. I can’t even set my bindings because the controller doesn’t work after some time.

What did I do wrong? Do I have to configure something?

Thanks!