I received a Weathered Mysterious Satchel the other day and right-clicking causes the icon to go gray. The object also cannot be moved from its position in my bag (Large Green Bag). I submitted a ticket and the GM response was to “do a full UI reset.”
A full UI reset was accomplished per BattleNet page “Resetting the WoW User Interface”. The problem still exists so I was asked to submit a bug report.
Note: Although my character Wyot is showing, this occurred on Katinna-Uldaman.