Hello Victor and friends of the game. This shouldn't be like that, should it? Haha, I solved one game without being able to get rid of the monster cards, because from 3 open pirate cards on you cannot do anything about the monsters anymore except putting them aside. You can never win such a round.
Screenshot taken playing version 1.3. It was taken after a fresh install from F-Droid. Most of the times I am able to work my way around this bug, but sometimes a game starts with 3 pirates open, and then it's already over.
By the way: The pirate card kept glowing and pushing the monster buttons doesn't have any effect except for the buttons itself glowing up for a short moment.
My best regards, congratulations for the game and thanks. It's a very fun game that I enjoy playing casually.