When playing multiplayer, the person who joined is not able to open the chests.

My friend and I were playing multiplayer, and we also have shops, so chests are very important. When I went to open my chest, the iPad froze, then exited out of the app. We tried multiple times, with no luck. We even started a new world, but still the same thing happened. Please fix this. My friend and I play multiplayer a lot, and now we can't, or it's no fun. Please fix this bug. The up-date (0.6.0) was excellent except for this.