Hello Dead,
So I tried breeding the new villagers, but it doesn't seem to work either. I'm clueless as to what the problem is right now.
All I can say is that the villagers seem to be going in some form of 'trance' after a while where they don't do anything: they don't move, they don't take jobs, they don't sleep, ... You seem to be able to 'reset' them be right-clicking on them which activates them again, but they always return to that 'trance'-state fast.
I hope this might help.
Thanks