Why is it that some sprites render in game view and others do not?

I have a problem with my school project. It’s a rather simple 2d game with a jumping character. Well here is the problem: I press play and the game runs well, but if you have already played for a while the platforms my character runs on don’t show up in game view. The platforms show up in scene view. I have no idea what could have caused this problem. A platform is just a simple square sprite colored black.
Some Helpful Notes:

  • I am using the instantiate method
  • Unity version 2019.4.15f1

Figured it out. The z position of the platforms was increasing over time which caused the camera z position to be lower than the platforms