Is there a bit of a hump at the 14th fret body joint? That would explain it. It's not ideal but I would not be terribly worried about it. The measurements that you have stated for the action at the 12th fret is about as good as it gets for any guitar. So if the guitar sounds good, plays well, then don't worry about it.
Try measuring the relief from the 1st to the 12th fret.
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