I've just noticed sometimes I go to F5 (I do it really often) I can see that my character is missing or it's invisible, but it's not only with me, also other players/mobs are disapeared, they're there but I can't see them. This hapens in some places, mostly after I get farther from spawn XY 0 about 100k blocks or more this hapens more often. Also, I've asked the other player if it's only me or it's global, as he said it was same for him.