Icy Runestunes don't stack
It’s a bug. Put them in your inventory, change maps, and then restack them.
Tried it and worked out fine. Thanks!
Well the “can’t stack/won’t stack” bug has been reinforced with the latest patch so things that were affected by the bug from previous patch are falling foul of it again even though many of use used the work around of changing maps or logging out/in again with items in the inventory.
Now however some of them still wont stack like SP scrolls.. yes they are going to be phased out with HoT but until then I would prefer having my bank/inv slots not used up with duplicate items… bug fixing at its finest again ANET