I'm running windows 10 and a gtx 2070 with the latest driver. The driver hasn't changed since the last time I played the only change is the game itself updating. I did try changing the refresh rate to no effect. I'm not going to unplug the second monitor though to test that. Cause if it is the problem then I'll just do without the game. That is a deal breaker. I'll just have to try the game again after each update and see if the issue fixes itself.
Thanks for your help.