The game crashes when you place a mob head with {SkullOwner} in mutliplayer, after you rejoin it's normal, you can see the mob head of the player normally, other players placing mob heads will not affect you though.
MC-52542
Crash when placing heads
Resolved
Duplicate
0
Duplicate of MC-51206 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.