I messed with my monitors the first time it happened so I thought it was my fault but then after restarting the game and playing for a while the frame drop when windowed was driving me nuts so I tried to go back to fullscreen and it did it again. I'm forced to alt f4 to close the game as I cant use the menu at all meaning I cant safe log I took a video on my phone and will try add it here.
#Changing in or out of full screen breaks your ability to interact with menus
heady pumice
I took the video the first time it happened and hadn’t realised it was because I’d messed with the fullscreen/windowed/borderless settings