Villagers can close iron doors

I have a redstone operated double iron door to a house in a village as a back entrance to enable quick access if I accidentally hit a villager and anger the iron golems, these double doors are left open with a button for me to close them if I need to. Since the 1.11 update I have noticed that occasionally I find a villager inside the doors with both doors closed, today I saw a cartographer close just one of the iron doors.