4K Full Screen With G Sync feels 1 FPS

I recently bought Forza Horizon 4 and I’m able to run it smoothly at 1440p 165hz full screen g sync. When I tried running it on my 4K 60hz monitor I ran into some issues. The game says that I’m maintaining the 60 FPS but it feels like a slideshow (even at menu’s).

The only way to fix it is to either go into the Nvidia control panel and turn off G Sync or switch to window mode from full screen. Has anyone else encountered this issue? I was really hoping to play this game on my 4K monitor fullscreen with g sync…

I’m running the latest Nvidia driver and Windows Update. 8700k with 1080 TI no overheating issues. Hopefully this gets patched soon.