I had to go back and rewatch the Final Fantasy V run and that was... a confluence of circumstances indeed.
First the runner had a character dead at the end of a fight off-route, and figured they could make up the missing AP from a battle that turned out to not give AP but that never mattered in the past. They realized they were still off AP route at a point where no battles were available, at a funnel to a boss that just happened to hard-require the one ability they were missing due to the AP shortfall.
They routed around the shortfall and got a battle route that worked, only to find a bug exclusive to the Pixel Remaster of FFV that made that particular strategy in that battle cause the boss to glitch and auto-heal itself to full. Again, not relevant to any known play configuration so not known or thought about until now.
What a ride.
@trysdyn did they end up finishing the run?