Game Freezing

So this started happening the other day and it's rather quite annoying.

My game just keeps freezing and stuttering in the middle of games and it makes it almost unplayable. Also when I'm playing with other people in a group I get the problem with the dedicated sever error and then if it does work my controls get all messed up.

I play on bump jump and a few times it changed my layout when the game started. It will still say I'm on bumper jumper but it is definitely not. If i change it to something else and then back again it works but it's just very strange.