Hello,
Depending on the map, just as well with the Firebird as with the Heracles transport (the others I don't know yet), I experience various exit paths. At first, I suspected it was connected to the rescue zone, as it may varies as far as the Firebird is concerned. Now, I'd think it's rather a variable alignment with some map grid. Sometimes, it may even be asymmetrical (I'm not sure for the Firebird).
Does this depends on how the maps were created in the past? Could this be corrected? Do you need the maps names ?
Screenshot 1-3:
Firebird with T-rescue zone: symmetrical, 2-squares exit
Firebird with T-rescue zone: asymmetrical exit (indeed, I'm not sure but I once could have a 3-squares wide exit)
Firebird with square rescue zone: 2-squares exit, loss of the two front-most squares (not an exit concern, but a real cover one!)