The last couple of days, I've been having problems with my sensitivity. As in, when I've gotten a lag spike, recently I also become occasionally locked facing a certain direction for as long as even 30 seconds at a time, and when it comes back it's extremely jittery. I'll be able to actually turn like I have normal sensitivity, and then suddenly for a brief second or two I can't do anything.

As you can read, at best it makes the game very difficult to play, and at worst makes the game almost literally unplayable. Also, to answer a future question, yes I have a battery-powered mouse and I did change the batteries in it to brand new batteries straight out of the package. Same problem still happens.