Gems didn't drop after doomskulls exploded. Ofc, in GW battle

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Describe your issue:
After 4 doomskulls match board was cleared by exploding skulls and gems didn’t drop after. I cannot cast spell, cannot march gems, cannot do anything. How am i suppose to finish this battle, don’t feel like retreating in GW? This is how it looks like now:
Screenshots or video: