FC 26 FPS works in one monitor (max), goes down to 10 in my main one

Hey everyone, I’m having a strange issue on FC 26 (PC). When I play the game on my 2K 360Hz monitor, the FPS stays very low (around 10–30) and GPU usage is about 40–50%. But when I move the game window to my 1080p 240Hz monitor, it immediately goes up to stable 240 FPS and full GPU usage.

I’ve tried updating NVIDIA drivers, setting “Prefer maximum performance” in Control Panel, disabling G-Sync and V-Sync, switching between fullscreen/borderless/windowed, and setting Windows power mode to High Performance — no change.

Specs: RTX 4080, i9-13900K, 32GB DDR5, Windows 11.
Monitor 1: 2560x1440 @ 360Hz
Monitor 2: 1920x1080 @ 240Hz

It looks like FC 26 doesn’t properly use GPU resources on my main 2K display. Has anyone else seen this or found a fix?

Thanks in advance,