We have the same issue with 1.8 vanilla server and clients. Also, ghosts cannot be kicked, but mobs do attack and kill them, and when the character logs on later, he dies immediatly. And it leads to item duplication when there are multiple ghosts. And the chance for recreating bug is increased when using teleport (to 1000-3000 blocks away) commands by command blocks (they was fine and well-used in 1.7.10,). The affected player knows the bug a few seconds beforehand the actual disconnect by not able to use anything. The server's response time to this (1~5min) is also unnacceptable in many situations.
We have the same issue with 1.8 vanilla server and clients. Also, ghosts cannot be kicked, but mobs do attack and kill them, and when the character logs on later, he dies immediatly. And it leads to item duplication when there are multiple ghosts. And the chance for recreating bug is increased when using teleport (to 1000-3000 blocks away) commands by command blocks (they was fine and well-used in 1.7.10,). The affected player knows the bug a few seconds beforehand the actual disconnect by not able to use anything. The server's response time to this (1~5min) is also unnacceptable in many situations.