[Dude Here]

I've had this happen before, it sucks when it does but it's even worse when it's a pricier stick like an Anejo. It's just tar build up, a rare but natural occurrence with cigars. What was the ring size of the cigar you were smoking and were you smoking it kinda fast? I noticed you said that you were still new to cigars and a common mistake of new smokers is smoking their cigars too quickly. Combine that with a smaller ring gauge smoke and you increase the chances of tar build up.

Hope that helped. Merry Christmas!