In multiplayer, a bug has arisen when a player is disconnected due to the host closing the world. occasionally (I have not found specific instances yet), when the host closes a world while another player is still active in it, that player will rejoin without any of their items at the original spawnpoint. this only happens when a player is disconnected by the host closing the world, and does not happen when the client unjoins and rejoins (as far as I know).
This has been found in 0.11.1 on Apple iPhone 4S and iPhone 6.