@tyne141 Thanks for flagging - the issue is caused because the ACU tries to retreat to what it thinks is the nearest safe place, but due to the simplified pathfinding approach M27 uses it doesnt realise there are cliffs that will mean the quickest path to the safe place takes it closer to the T2 PD. Unfortunately there's no easy fix for this scenario (e.g. just running in the opposite direction to the PD would cause the ACU to go to the wrong place in other scenarios).
It's been mentioned that there are plans to update the base FAF pathfinding logic so I'm holding off spending time trying to improve the approach M27 uses for now as there's a good chance I'd be switching to the new logic if it's more accurate than my current method