As a small side note… For “Hi Fly team” posts, it’s best to use the Questions / Help category (which I just added to this thread). That way, it’s inducted into Fly Support’s formal ticketing system.
https://community.fly.io/t/your-posts-are-now-getting-sent-directly-to-our-desks/27767
I’m not with Fly.io myself, but one useful tip is to use the flyio-debug: doit header in your curl requests. The answering flyio-debug field in the response carries information about what exactly happened, although the format is admittedly rather cryptic.
Hope this helps a little!