Getting killed by something silent and invisible over and over again

I killed another player, got their stuff and ran off back to my little hut, suddently I’m losing around 20 or so health every few seconds. It’s not a sniper as I’m inside my hut that has 4 walls, a roof and a locked door?

Are you bleeding?

zombies, wolfs, and bears can hit you thought walls and because of the rendering bug they seem invisible but if you were bleeding it was because you bled out