Hello, I played about 3 days ago so I'm not sure if this bug is still relevant after updates, but:
Victini wouldn't return to its original position after using Final Gambit with Endure on, basically it would go onto the target mon and attack, faint, endure and then stay in the spot it attacked from.
I don't think it stopped it from functioning, but it was hard to tell since I only used Final Gambit toward the end of fights as a finisher.
Awesome game btw! I really enjoy projects like this that take the gameplay in a new direction :)