Losing battle items

I have encountered a bug where I have lost multiple battle items by dragging them from the battle item shortcut menu at the bottom of the screen to the inventory menu (which I was doing in an effort to rearrange them). The items disappear from the shortcut menu but do not show up in the inventory. I lost a couple of consumables which was no big deal, but I also lost a Destruction Bomb which was a bit more significant.