That's a cluing that your Am's were not homozygous for beards. It's common sadly. My first Ameraucana based OE's also turned out either partially bearded or clean-faced.
My Ams are all Cree Birds, there is your clue, that said, alot are turning up mottled.very strange & very beautiful.....I suspect Orloff i their ancestry.seriously !
Flightly & slight, but awesome beautiful.