Talk:Command/@comment-25984339-20151130194832

"Using the Captain's Brooch and Skeleton Key in Co-op may cause you to no longer be able to open anything, including these boxes. If this bug occurs it will be fixed by going to the next level but will trigger again as soon as one of these items are used, thus, for the entire duration of the game session. There is no known way to predict if the bug will happen, but seems unlikely to be triggered by the host player."

Please verify to those who play with their friends. As far as I know, this bug (Captain's Brooch) actually just spawns the chest at a different location than that from the host and its clients. Only the host can open the "desynced" chest as he sees on the host's screen. When the host opens the chest, then all players can see the spawned item.