Animation Events not always firing

I have a 2D character with four different idle animations. Each one is set not to loop and they are all frame based sprite animations. On the last frame of every animation is an event which calls a script that sets a random time for another random idle animation to play (I'd much rather set an animation end delegate with code but all my searches result in people saying set animation events). He plays a few animations like he's supposed to, but eventually, he stops firing the function on the...

Animation Events not always firing