When doing the Domhainne tunnels with the stone carving if you leave the dungeon with it on your back like a rookie it drops right in front of the dungeon exit and if you go back down, you can’t pick it back up as it exits the dungeon the mouse over thinks your trying to exit.
The sub quest is return the stone carving to the pedestal. Not sure if this is a valid bug but thought id throw it out here to see if I’m the only one that wasn’t paying attention and left the dungeon.