It won't let me downvote the OSX 12.1 answer, which is incorrect, as many others have stated.
The person who said that you turn your mouse off/on wins the prize from me. That is a pretty simple workaround, until Apple actually fixes their bug.
FYI, my mouse a logitech. I'm sure you Apple fanatics are gonna cry foul, but I doubt its cuz its a logitech. Others are impacted, not just me.