Item deleted when attempting quick move item from stash/guild stash

I attempted to remove a +3 to cold skills Gelid Staff from my guild stash by using the 'quick move items' keybind on keyboard and mouse, but my inventory was full (I had some empty spaces, but not enough together for the staff).

I wasn't looking directly at the item when I clicked it but after moving one item for the staff to fit in my inventory, I looked back and the staff was no longer in the Guild storage, or anywhere else that I could find.

The same thing happened yesterday with some other insignificant item in my own stash. If you need any further information from me please let me know.

Character played at the time of both incidents: KIEFtheSCOOP Druid(Oracle)