So there is this pretty annoying bug where the curser gets stuck ingame and doesn't move when moving the physical mouse. For me it kinda made the game unplayable...

I started playing around with the settings (changing resolution, mouse speed etc.) but i couldnt find a working solution.

What then worked for me was:
Setting down the mouses polling rate to 125Hz (it was set to 1000 before)
Fastest way to change it is by using the mouses "control panel or app" (for my Roccat mouse i used Roccat Swarm)
If you don't have such an Control App, try somehow changing the polling rate in windows...
Maybe this can help you https://www.youtube.com/watch?v=hNYPQPsLNe8 (I don't know if this is legit and works! I haven't tried it on that way)

Hope this helped you if you happen to have this bug :)