Linedance Partner 0 cost bugged

Hi, just a few moments ago, I was playing arena. I was playing Death Knight, I had an AZERITE CHUNK in my hand, used it into Linedance Partner, I had 2 cards in hand that cost 3 mana. It was highlighted. Played it, nothing happened, just the Linedance alone. Please investigate.

Did your opponent play the Reno hero card on the previous turn?

It looks like these cards are both not working if their cost is reduced, whether that reduction is from Shadowstep, Azerite Chunk or Fool’s Azerite.

The text says If you’re holding ANOTHER x-cost card…

But if the “partner” card doesn’t cost “x” any more, it doesn’t work.

now coming to report this

This exact bug just happened to me. The Linedance Partner was discovered from Azerite Chunk and the cost was 0.