I am really sorry to hear you encountered that bug, I was playing it with a friend of mine the other day and encountered the same thing. Very annoying.
I used a custom created level design kit a friend of mine made based of the Advanced Locomotion System. But there is a more complete version you can buy with loads of guns and better AI. I own it and was planning on using it for this jam but ran into a lot of packaging errors so decided to go back to my friends version.
Advanced Locomotion System (What my fiend based his one on): https://www.unrealengine.com/marketplace/en-US/product/advanced-locomotion-syste...
The full version (The more developed one):https://www.patreon.com/JakubW