UI breaks after about 15 minutes of playing

When I start the game, i have to wait in the menu screen for a couple of seconds until the menu pops up. After that, the menu is a bit sluggish, but this is barely noticable. However, after being in game for a few minutes, the UI keeps getting slower and less responsive. At some point, the UI just breaks, not reacting to me at all. The game itself still works however. Just the UI layer breaks.

I have tried the Solutions given in your thread. I installed the latest drivers, forced my PC to run the high performance GPU instead of the Intel-Chip one, and i tried forcing the game to use dx9, 11 and 12 (the latter just results in a black screen, the other two dont change anything).

I am running the game on windows 10 with 8gb of ddr3, a GTX 950M and an i5-5200U