So, a fun thing about dual booting and bluetooth is that your different OS will be using the same hardware and so they'll have the same address, which means that your bluetooth device will not be able to tell them apart.

This has consequences when your device is paired with one OS, and is trying to connect to the other OS.

Either you need to pair your device again every time you switch OS, or you need to extract the link key from one OS and import it to the other.