u/Unlikely-Cap-8833

This just happened on Talishar, and I am wondering if it’s a bug or correct.

I’m DIO and attacking Aurora on my third boost; Aurora has two cards in hand: an Attack Action and a Non-Attack Action with Purg available. I have one card left in hand. I force the Attack Action onto the chain with Pulsewave; Aurora adds the Non-Attack and Purg to the chain link, but no trigger. I keep my card in hand, and Aurora does not draw. Was this a bug, or is it something about Pulsewave’s ability that means those three cards were not defending together?