It's not a FPS problem, it's that the pause menu pops up with no input. I'm playing with a controller, and this doesn't happen in any other games.
Sometimes I can go a few races without it happening, sometimes it happens multiple times during a race.
Things I tried:
Disabled windows notifications
Disabled Nvidia overlay
Ran Steam and Dirt Rally 2.0 as administrator
Verified file integrity
Updated drivers
None of these seem to have worked. It's been getting really annoying and I can't find a solution.