fps drops when loading from another scene,FPS Decrease when loading from another scene

Before, my main menu only consisted of an image and some UI so I didn’t notice this problem, but it’s now an issue since I have added a lot of stuff into the scene.

When run the game from the main menu scene, it gets around 160 - 180 fps. However, when I load a level and then load back to the main menu, the fps is around 80-100 this time. I’m really confused why this happens because surely the same scene and same camera view will result in a similar fps.

I also have settings like fps, quality, and resolution, but these settings shouldn’t change when the menu first loads in. Has anyone experienced something like this before? Anyone know what to do?,Before my main menu only consisted of a flat 2d image which is why I probably didn’t notice this problem before, but when I wanted to make the menu look cool by adding terrain, grass, trees, and other stuff, I noticed a problem.

When I run the game from the main menu scene, it’s able to run at 160 - 180 fps. When I load one of the levels, and then go back to the main menu, the fps is around 80 - 100. It’s not too big of a problem for me because the menu is still smooth, but halving the fps would be horrible for lower end computers. I’m not exactly sure why it does this, does anyone know?

Same problem