Gun changing and no hub

I keep having issues of my guns randomly getting changed and at some point it won't stop chaging. I thought it could be my keyboard or mouse but even after disconnecting them it continues.

After picking up a teammate I am unable to see any of my hub or gun, scope, anything. This happens every other time I try to pick someone up. 

Additionally, when pinging something using the scroll wheel it will get stuck on that screen.