I think it's a Corn thing! My son's Corn has nasty poop every now and again for no apparent reason, other than being a Corn. I'm babysitting him (and his Brazilian Rainbow boa) for the summer and am used to Carpet Python poop, his BRB has normal poop but this silly Corn is a mess maker! My son says it's normal for him and we did have a fecal done a while back and it was fine.
Obviously keep an eye on it but I'm guessing it's not a problem.