I have a Logitech k480 keyboard that I can switch between three devices using bluetooth. When I use it on a windows computer it works great, ditto with my Samsung tablet. But with Raspberry Pi 4 Manjaro I am able to pair and connect without issue, but I get repeating keys.
I had a period of time before the kernel upgrade in November (?) where it worked fine, so I suspect that.
I need to do more testing on Raspberry Pi OS because I think that would help. I’ll do that next, but if you have any other tips beyond remove and re-pair I’d appreciate it.