I'm making a map with bugs and stuff in and I have a huge problem of bugs spawning outside of my map (its not like I can move the spawners because its an office kind of theme so its kind of confined into certain areas( plus its underground) ) I try to patch things up but they just keep spawning outside so if there can be a change so that bugs can only spawn through certain blocks -like terrain and stuff I understand its just wood that I build with.
#Bugs spawning through walls
maiden echo
grim badger
don't use the zone spawner then