@TheSxW No macro on, @neophobia and I have tried all USB ports. @dogfish Must just be the over abundance of buttons. I also have Roccat Tyon, which is the wired version. Really odd that this is a thing, hopefully the new engine will sort it out. Otherwise I'll just buy a mouse for APB then. Thanks guys.
Recently found out my Roccat mouse causes FPS drops over time in APB. Has anyone else encountered this and were you able to fix the issue? Already tried updating USB's, disabled/ made the extra buttons read as regular keyboard keys. I think it may be due to the memory and onboard CPU inside the mouse. Not 100% sure. Any help would be appreciated.