Dear Mojang today with some friends have an outdoor bug overhead, is to put a head from any mob behind a box and it breaks after that, try it in multiplayer and protected chests are broken, this makes the contents of the chest to drain and fence straight out, as if a chest is broken normally, this causes many users things other servers where not allowed is stolen, this is not good and I want it solved by the good of the community.
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Duplicate of MC-52717. This has already been fixed in a future release.