Apologies in advance if i sound weird or got something wrong in posting, i barely even know how to use this, but literally nowhere else provides a solution to this problem so here we are.

Basically, i remixed a tower defense game, and i'm pretty sure i know
how most of it works, but for whatever reason, on 2 (occasionally 3) specific rounds,
one of the fast enemies get stuck at the beginning and suddenly becomes immortal,
so it can't leak or get destroyed, and the wave never ends. The project is right here, but the problem only happens at wave 18, so yeah.
https://scratch.mit.edu/projects/1257387454/
Also, the project isn't even done yet.