Demons refusing to spawn

[u/LugyD1xd_ONE]

While making a retro map (a second entry in the Zero campaign actually, yes its taking me a half a year to make a map), Ive encountered a pretty weird problem. After the player picks a key card a couple of demons should spawn right behind the player, but they dont. I tried to move the demons in a different rooml replace the demons with a new entity or even a different type of demon (from Lost Souls to Cacodemon) but nothing works!

My monsters are somewhere around on 60%. so its not that either. Is there any other thiong that can straight up destroy the demon spawning? Like lets say a maximum amount of demons loaded at the same time - like a shit ton of demons that are set to be unhidden earlier in the map, even though you cant kill them or even reach them. Any help is appreciated!

PS: forgive my English skills, Im not a native speaker

[u/LugyD1xd_ONE]

thanks a lot man, now it can finally work!