By the villager's new behaviour, I think you changed them to close opened doors in the night. Well, my problem is that now they close iron doors too, but they can't open them. So if I'm in some place opened with redstone, they come and close the door and I get trapped there. If it's day, they come with me, and when they walk through the opened door, for some reason they close it, and we both end up trapped there. The fact that they can't open them proves this is a bug. They get trapped in places like these: