Custom Item Sets not allowing items to be added

I am trying to create a custom item set for Jace (not sure if champ is relevant to the situation). When I go to the item sets to make one, I can get the set saved but I cannot actually add items to the set. It will allow me to drag icons but it doesn't save the item to the set or show up in game. In game there is only a blank item set. Anyone know a solution?

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