I know that this may not be a bug, but it sure is and inconvenience which shouldn't exit as it never existed before.
I just opened a new world too, and the farmers seem to be work properly. Maybe it has something to do with the seed or something idk. This is the seed that doesn't work -1518513656364972663.
Item frames are Invisible.
For me it was false, cos I hate creepers blowing things up, but villagers were never affected by this command before.