I'm seeing this on Windows 10 1.8.0 as well.
On windows 10 1.8.0 and also have this issue
I've come across this bug as well. I built the same villager trading hall and found that the villagers occasionally vibrate, setting off the adjacent detector rails. I'm on the Windows 10 edition, v1.0.8.
I'm seeing this on Windows 10 1.8.0 as well.