Extreme lightning difference in same scene

Hello,

This is what happens in my game (see image)...

I don't know what is causing it. When the player (a bouncing ball) is in this area the linerenderer often doesn't work and some of the pins dissapear to then randomly appear again.

The lightning is set to baked and there are 2 directional lights in the scene. The second scene (which you see on the image) is activated (set active) later in the game. Could this problem be caused because the level isn't baked?

If you have other solution, please share them! :)

-Regards Quint van O.