Popper Stud Tolerance

What is the tolerance for the popper studs on the Beaufort?

I got a new Beaufort and while the zip doesn't actually rub on the stud, it does seem to catch at the top stud

Is this out of tolerance, and is it something Barbour would repair?

I'm quite happy that the coat still has the royal warrants so don't particularly want to exchange if I don't have to but it might be annoying (though only worn it a couple of times when it arrived as it's technically a Christmas present)