So me and a friend were messing around and we discovered a bit of a bug. I was able to reproduce it multiple times (admittedly in the same spot, but it doesn't seem to be a map issue) and will post a video later.
If a Falcon ( and possibly fire prism) are killed on the edge of a cliff, untis will be able to walk up and down that cliff as long as the vehicle wreck is there. If the wreck is destroyed/salvaged then they can no longer do this and pathfinding works as intended.
Steps to reproduce:
Position Falcon on the edge of a cliff.
Units can now walk up and down cliffs simply by clicking anywhere in the fog of war. They will prioritize this over normal paths if it is faster than other routes.