OS: Android 4.3
Device: Samsung Galaxy Note 3
Game Mode: Survival
Additional Apps running: Pandora
While playing MCPE in Survival mode and digging several blocks below ground, consumable items (Iron Pick, and Torch) began showing up as a duplicate in the hotbar on the game screen (not inventory).
It was confirmed that the duplicate item was not a separate instance by consuming and witnessing both instances of the item decrement in quantity (torch) or consumption (iron pick) at the same rate and time. I'm unaware as to whether or not this happens with other types of resources.
While playing the game Pandora was also running in the background. I'm unsure whether it is related to this issue.
Attempting to repeat/verify the issue:
I quit and restarted the game, and entered the inventory to verify that duplicate instances of the same item should not be viewable by selecting the duplicate item and replacing it with another item in inventory.
I next tried re-selecting the same (previously duplicated item) from inventory to try and replace the newly selected item. The duplicate instance did not re-appear.