Great to hear! What sort of issues did it fix? I'd like to add it to the changelog.

Hard to tell, these bugs led to undefined behavior. This could have caused anything, from having no effect on the actual gameplay, to random crashes, to the AI code not working as intended (I remember you sharing a story along these lines, although I think it is unlikely that these bugs had anything to do with that.) I think the most likely outcome is that, occasionally, the AI would do something it was not supposed to do, but it is unclear whether that would be favoring the AI or the opponent.

Thanks! I'll write it up.