Duoqueue

While dragging a lum berry to my pokemon I encountered a glitch where the current inventory graphic for the lum berry sticks to the screen as can be seen in thishttps://puu.sh/qjl3l/6a254a2704.png. This happened twice as i was trying to recreate the bug afterwards to make sure it was actually a bug. I'm not sure as to what may have caused it either time but I was able to make it happen twice by clicking and dragging. Like I said not sure the actual conditions for the bug. Thanks for any and all help any of you can provide