If you hold left shift and left click on Rune of Shattering at a vendor it takes gold but doesn’t go to your bag or your crafting items, it just dissapears if you click it 2x via shift + left click.
Edited.
I asked cstlhwkthrn if he encountered this and he has the same thing happen to him but he pointed out that it goes to the Buy Back tab. Still A bug I think, but wanted to update.