I was looking in some chests in my home and somehow a creeper spawned behind me, and there were no nearby creepers in the area which means it spawned. This happens with other mobs too, like zombies and spiders. Mobs spawn very frequently and very close to the player, so fix it. Go. (btw this happened in 1.19.2 i don't know why the affect versions doesn't have 1.19.2 in there, 1.19.4 and 1.19.3 fucking sucks so I'm not playing on that bullshit, it has too many features)