absoll: I was trying to make a copper ore into a bar. Then one time I got an error saying not to be in multiple taps so refresh blah blah blah (I wasn't in any other tabs). After I refreshed, the copper bar and all its progress was gone.

absoll: UPDATE: My ore appeared again as a complete iron bar? Weird. Maybe it just didn't show when I obtained it. It giving me the error about tabs is still odd, however.