are u on windows 10 ? if this is external bluetooth perhaps you can try adding short extension cable.
please also try this method:
1. can u try installing this:
https://github.com/Davidobot/BetterJoyForCemu/releases
2. do this
Before uninstalling the drivers, navigate to http://localhost:26762/ and remove all the devices from the “Currently affected devices” list and then restart your computer.
3. uninstall BetterJoyForCemu.