On multiplayer other players might disappear after teleportation. This only happens some times tho. It can be prevented by relogging or dying. This is annoying for snapshot pvp servers since players lose their hitboxes along with the ability for spectators to teleport to them
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[Mod]Les3awe
chokoboy3
This is different tho. You can't see that you have become invisible for yourself. Other players just can't see you. As if you are not sending certain info to the server. That's the reason it only works in multiplayer. I have seen this happen to multiple servers and it definately wasn't there in 1.8
kumasasa
This is MC-65040
May be relates to MC-92324?