Dragging item on ground sometimes results in invisible item

[hgesler]

Working on repro case for this. Happens when dragging things and some latency perhaps. A draw issue only.

A few times now I've had a bat wing etc on the ground that I moved and something went awry with the left click move; the item is on the ground with a counter/quant on it, but it is invisible. I can tooltip over it. See image below. Possibly related to #551

[davidjreese]

Think I got this. Let me know if you see it anymore