Things act differently in "Maximize on Play" view

I had just finished integrating Unity Ads into my game when I ran into a problem. When I am in the "Maximize on Play" view, things do not work like they do in the other view. For example, I have a plane behind my background (for reasons), and it does not show in the normal view. In the maximize view, it shows over my background. Now I thought this might just be a small issue for something that I messed up until I tested my ads. In the normal view, when I click on the ad, it pops up telling me things are working fine, and then the close button restarts my scene. In the maximize view, the scene does not restart when I close the ad. I am very confused, and I'm not sure which is correct. I'd also like them to function the same because it is very annoying. Thank you.

I'm on Mac, Unity Personal Edition, 2D, iOS.