Hostile mobs don't seem to be spawning anymore in my JAVA modded server, specifically I think it was after installing a mod called "improved mobs" I noticed mobs stopped spawning, I swiftly removed the mod and it's configs but now hostile mobs aren't spawning at all. Everything else from every mob mod I have spawns as long as it's not hostile (zombies, skeletons, spiders etc).
Issue summary
I tried the same mod setup INCLUDING the "Improved mobs" mod in single player, hostile mobs spawned. I tried it again by making a NEW server world and mobs spawned. I tried deleting my config files inside of my server folder just in-case but no changes. I also tried removing all my AI affecting mods and it didn't change, yet trying it in single player or on a new server world hostile mobs spawn. So clearly the issue seems to be my server world which. I also tried turning off the "forge remove ticking/error entities" setting but the issue still continues [Blocked Image: https://media.minecraftforum.net/avatars/0/17/635356669596699902.png]
If you need any server info or my mod list please let me know! ANY HELP WOULD MAKE ME SO HAPPY I MISS MY WORLD 
Thank you so much! 
