So I've been playing on this server for like a month and I discovered that for some reason in some chunks hostile mobs won't spawn or at least you think that they don't spawn because you can't see them , you can't hit them with swords but you can with bows and wand focuses. No there's no magnum torch and other stuff that prevents spawning on my island (only in my house theres one but the 16 block one but it's far from it) but it's kinda annoying when you want to summon a demon and nothing happens.. Is this some sort of chunk corruption that can be fixed? I've marked one of my chunks with a red square and I would be happy if someone can do something about it.