OnPerformFatigue triggers in a loop

I'm following the CCG series, and I'm running into an issue where my OnPerformFatigue method triggers about ~63 times when I dispatch a FatigueAction. All the system unit tests are all green, and I can't seem to find any differences in the code. Is there a common issue that would cause this behavior? I've been scouring my code for about 5 hours now trying to figure it out. All the other actions seem to trigger fine. 

Thanks!