All my items in my stash is gone?!

I just have started the mapping.
After first my mapping, I realized I had the quest item that didn't exchanged for the gold in the act 3. So I went to the normal difficulty act 3, and exchanged my quest items for gold. And I came back to the mapping stage; and all my items in the stash is gone. Please resolve this issue for me.

p.s.
FOR SURE IT IS NOT "HIDE REMOVE ONLY TAP" UI PROBLEM.