I had a problem on a M1 24" iMac / Big Sur, where the (Magic) mouse would behave choppy and slow. I found, re-plugging a USB device (and by this restarting the

I had a problem on a M1 24" iMac / Big Sur, where the (Magic) mouse would behave choppy and slow. I found, re-plugging a USB device (and by this restarting the driver stack) solved the issue. I'm not sure, if this is the same problem, but this was definitely a more general problem with the USB driver stack, not just with the cursor that eventually displays the motion. (That issues are reported for both scrolling and cursor movement also hints in this direction.) There's also a wakeup-immediately-after-sleep issue, which seems to be linked to the USB stack, as well.