I'd be asking him if there's an Ineos fix first. An enthusiastic workshop apprentice let loose adjusting a door that doesn't seal properly does not fill me with confidence that more damage than good can come from it.
I think there's enough anecdotal evidence on the forum and elsewhere to suggest that there's a design issue rather than an installation issue.
If it is indeed a latent defect, then we all should have it, not just those that have actually experienced it.
This is only worth noting as most major manufacturers usually start their TSBs with words along the line of: "If the customer expresses a concern that...", i. e., if you don't mention it to them, then they won't fix a fault they know you have.