So.. I was playing this other MC server and I found two spawners together..I let them build up on purpose while being safe. (They were cave spiders) I broke a block to kill them and I started to lag.. Like 5000 cave spiders swarmed inside my safe spot. I logged off, I went on a bit after and they were still there :/How long does it take for them to un-spawn? My diamond armour isn't eating all of their attacks and I'm like 4 hearts.