Quit & Copy Map No Longer Works

Upon the release of 0.5.0 Alpha I noticed an inconvenient glitch. It has not been fixed and has worsened over the updates that followed; I can now no longer Quit and Copy Maps - As of 0.6.1, the whole process has become useless.

I play Pocket Edition Multiplayer (Survival) with my friend fairly often. When we're done, I usually press "Quit & Copy Map" and name the copied map etc...

When I open the world, I find that the world looks like no player has ever set foot upon it, despite some floating torches and paintings. Oh dear.

I also hear from friends that this bug happens even to players using iOS.