Bluetooth mouse rapidly reconnecting and disconnecting.

My Razer Basilisk X Hyperspeed mouse rapidly connects and disconnects. Looking at the log it seems that it is being misidentified as a keyboard though I do not know if that is the cause.

There were issues with bluetooth with the 5.15.x kernels. The bug report is here: 1193124 – tumbleweed release 20211124 with kernel 5.15.3 bluetooth fail

For me the 5.15.10 kernel fixed the issues. Which kernel are you using?