Thralls and Human NPC's glitching through the World/Floor

Game mode: Online
Problem: Bug
Region: [Eu/Official #1206]

One of my Thralls and even one of the Human NPC’s I knocked unconcious with my truncheon has glitched through the world and are gone. I thought this has been patched, but somehow the bug is still there.

My Thrall was standing in my house when he disappeared. The knocked down Human NPC immediately glitched through the world as he fell down.