Problem with the Great Maw at end of the game

Once near the end of a game there was only one enemy left on the opposing team. I used the Great Maw to devour him and win the game (I thought!). But, instead I got a msg re something about having no enemy to devour and the game crashed. After reloading, I found that I had Lost the game! The enemy I used him on did not have a trait to stop getting eaten, so I don’t know what happened… Has this happened to anyone else? Never had a problem before with him, only when trying to devour the very last enemy. Thanks very much.

What are the steps to make it happen again?

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