I recently created a realm and was playing with two friends. While playing normally I randomly started taking damage I was constantly checking my surroundings I could hear a zombie but couldn't find anything that would cause me to take damage. I eventually died. The death message said the I was slain by a zombie. Then later during the same game my friend who was also playing on PS4 stated he was being attacked from a skeleton that was invisible because he could hear it but could not find it. My other friend did not have this problem but he was playing on the windows 10 version, I don't know if this has anything to do with the bug but wanted to include as much detail as I could.