[Gameplay] Twisted Fate Pick a Card bug

I recently just played an aram as Twisted Fate. I had one instance of my Pick a Card gold card dealing no damage, but still making its sound effect and stunning its target. The enemy team had no shields, and the target in question (graves) did not have a blood thirster, so there was no shield there. I died just before it hit him, so I don't know if that had something to do with it.

There was only one instance of this event, so I'm not sure if it will happen every time, or if dying was even the cause. I had a Lich Bane if that's relevant.

1. Use Pick a Card and select Gold 2.Throw the card
2. Die before it hits
3. Target takes no damage but is still stunned.