Ok so basically, whenever i open a zone my game freezes for a bit but then acts normally again (unless i already ended the round), when i kill the last zombie no more spawn infinitely ending the rounds.

i setup all the zones so that they touch and don't merge with each other (if that's the problem), i set up the zones in the gsc and rebuilt the mod for that, i even double checked if the doors open the correct zones.

i cant find the problem so im here to ask the mapping community in general.

(also if you want a response from me, give it awhile as i have a tendency the leave things alone for long periods of time)

I think you did something wrong while creating the zones.
This youtube video explains very well how to make zones.

thanks for the suggestion, but I have already seen this and rewatched this video like 80 times