I have two pop doors, each leading into a different section of my attached run. Allows me to separate the birds as necessary, since I can partition everything off as needed, and still provide access to things.
Up till a few days ago, my young ones (now 11 weeks old) only used one particular door, since I had a partition wall up in my coop to separate one bad hen. Now that the partition wall is down, they use either door. I am still opening both doors since I was unsure of how they would adjust to the other door being accessible now. However, this morning, when I opened the one they are not accustomed to, they all ran out into the run from that one. So I guess they just don't care.
Still trying to decide if I will now just leave one shut until needed again for any reason. For now, it does allow the littles to get away more easily from one particular hen, since they can just dart into the coop on one side, and pop out on the other, well away from her. For sure, I will keep one closed for the winter.
I realize your issue is related more to free ranging access, but I think they will adapt as required. I just open the run door to let them out for supervised free ranging, and they all know to run back that way when something spooks them.