From time to time my sensitivity gets really low. Sometimes it gets normal after respawning or after tapping in and out again. I never had this problem in another game. I havent changed any drivers either. My mouse is a Roccat Lua. Official drivers, no overclocking or anything.
[Game Bug] Mouse Sensitivity
I’ve reported this a few weeks ago, but it was ignored.
I only get it when I am using Vassili. If I zoom in and out a few times my sensitivity stays on ultra slow until I die, and then it resets to normal. That is until I start zooming in and out again.
It doesn’t happen all the time, but when it does happen you literally can’t play properly.
http://forums.dirtybomb.nexon.net/discussion/22289/sensitivity-bug-with-vasilli#latest
I dont play Vassili and I almost never use iron sight/zooming. There is nothing I could say, I did to start it.
@rancid just because I don’t reply to every thread doesn’t mean it was ignored! I am a busy busy person. It’s being looked into. 
Any news on this? It’s getting really annoying. In some games my sensitivity screwes up after each death. So I have to tab out every time and that doesnt even always fix it.
For reference @NxA_Noxie, I can replicate this bug almost every single time I open X-split. Don’t get me wrong, X-split isn’t the sole cause of the bug, because I do get it every so often when X-split isn’t open, but I can almost guarantee that every time I do have it open, I get horrible inconsistent sensitivities with severe input lag. I’m not sure why, because my PC is quite new and more than capable of running everything together, and I do play other games aswell with none of these problems. It isn’t FPS related either, because even with X-split running I am still getting 150fps or so while this problem occurs.
But my point is whatever happens to your computer when X-split is running (is that CPU related? Hopefully someone with technical knowledge can help me here) is very likely the cause.