So I noticed that one of the traits SMN gets allows for accumulating 2 stacks of Radiant Aeigs.

This evidently is a pet move that gives a shield.

However I have NEVER seen my carbuncle use it. Even when I have purposefully been watching for it I have never gotten a shield, nor can I manually activate this action.

So does the pet actually use this and I just never see it? Like not even a buff icon? Or do I have to do something to get carbuncle to use it?