Game froze playing Mew VMAX

Looking at the forums this seems to be a known issue, playing first game online with Mew deck and the game froze whilst activating Genesect V's ability. This was the second activation of the ability this turn. There is a Forest Seal Stone attached to a different Genesect than the one using it's ability. There is no energy attached to any cards on my side of the board.

The game has been frozen like this for about 10 minutes now. I can click on cards in play, the discard etc. but the ability won't activate and the game can't progress.

I've attached an image to show what this looks like.