I appreciate you taking the time to write the facts. I’d like to highlight:
The “reproducible project” is mychapterpay-3. Any engineer on your team can be granted access, deploy it, and see the bug happen instantly.
This GitHub - ThomasHoppel/vercel-bug-repo repo doesn’t contain any auth logic you mention in your latest reply. We ask for a publicly reproducible code so everyone can pitch in to help. We don’t usually take your codebase and use it to debug because it has has many dependencies such as databases or 3rd party integrations. That’s why a minimal reproducible example is helpful.
In the meantime, I’ll try to reach out to our team to see what we can do.