Severe FPS Drops (5-10 FPS) in every game mode, even in Menus

I’m having an issue with EA Sports FC 26 on PC. Sometimes the game runs perfectly fine with smooth and stable FPS, but other times, once I open Ultimate Team, the FPS drops to single digits and the game becomes unplayable. I play on the lowest settings, verified the files, and tried many configurations. It feels like something randomly locks or overloads the GPU. Sometimes pausing the game fixes it temporarily. My current workaround is switching to Windowed mode and setting Render Scale to 50%, which gives around 20 FPS. When it recovers, I go back to Fullscreen and 100%, but the FPS can drop again after opening a pack or pausing and this issue