With all the selective breeding for fancy morphs, some defects might also be passed on. We don't know for sure that's what happened with yours, but it's a decent guess, & best prevented if possible.
Personally, I'd make him aware of it. Just to see what he says, & just so he knows regardless.
I can remember years ago hearing about a snake that actually had no opening at the cloaca- some defects are visible, but many are not. I once had a parthenogenetically-produced neonate (rosy boa) that was born with obvious defects that nevertheless managed to live about 6 mos. before she succumbed to some internal abnormality that ended her sweet little life. So it does happen. I called her "Longshot" & I was truly rooting for her. Many things can & do go wrong- that's partly why "baby" snakes cost less than ones that have lived longer- their risk (of issues) goes down (& of course, there is also an investment of time & food with more mature snakes).