Item frames in MCW10 Realms duplicates item when removed

In Realms when I place an item within an item frame and then I remove the item it pops off 2 items... ie. If I have 1 sword and place it in an item frame then I remove it I will now have 2 and so on forever.

I tried to duplicate this behaviour within a pc resident world so I exported my realms world to my hard disk and tried the same thing and it does not behave the same way.