Yes, that happened here a few times. I don't have much advice to offer, we really didn't have any luck at all creating accounts like this, so creating the account is part of our installation workflow (less than ideal, but we're just getting started with DEP).
If a zero touch deployment is what you're after, you might even consider dropping the local admin account altogether, or creating it by other means (a policy I'm thinking). A lot of organizations ban them altogether because they pose a decent security risk, but this is definitely a bigger picture item.
It's actually creating the second account just fine.
If I quit from the spalsh screen, it's there and I can login using that a/c.
Just slightly annoying as it didn't happen in 9101.4