First: Thanks for the new Build!
My problem:
I tested a little bit around, made a small Map. First Problem is, that Zombies simply can go through walls.
Second and more important, GG Max is randoomly crashing while editing. There is not a special thing that causes this. Sometimes the GG Max Window just go awy. Blend out. Disappear. Without any Error or something. It just happend after some minutes of editing.
I wish I could give you more Info to find it but there is no more ...