It is common but not normal. It is a relatively simple repair for any competent cobbler.
I have half a dozen Alden's with similar loose stitchings. Alden will fix it for free if you ask. But you will have to pay for outbound shipping if you were in the US. I don't know what would be the policy for overseas claims.
I would recommend seeking advice from Tassel, politely suggest to have the repair done locally, but have Tassel reimburse you.
Do you know if they fix seconds?