NOCTURNE DEVOURER BUG

As Nocturne I returned to base in order to purchase the final upgrade for skirmisher's sabre - Devourer, and it caused the champion to be unable to move. Having any other piece of the item had no negative affect, but once completed no movement was possible. There were other champions in the game running devourer with no issues, so it appears that it is only Nocturne that this has happened to. Once I hit the "undo" button everything worked, so as long as I did not purchase skirmisher's sabre devourer. Please Fix / Help