Making a horde/wave based third person shooter. The enemies stop spawning after wave 8. How do I fix this?

As the title says, I’ve been working on this game, but the waves of monsters stop spawning after the 8th wave. I have a game mode created with the enemy logic housed in it.

Here’s a screenshot of what I have:

I followed a 6 hour youtube tutorial on this game, and I’ve backtracked extensively but I’m at an absolute loss on why my monsters eventually stop spawning.

Can somebody please help me out?

You can contact me on Discord. I might be able to help you out: dr.vegapunk1337.