First, congratulations on your gobbler.
I have heard of some beards falling or breaking off for various reasons, but not a gobbler just not growing a beard. Weird.
As the season progresses, you will see examples of many variations and anomalies. One fellow here in MS just recently shot his first gobbler and on one foot it had only 2 toes and a 1.25" spur that had a 90 degree hook to it.
FC