Thanks for sending those over @RobIII
At first I want to confirm, are you using the "V3" API endpoint in ProGet, for your VS2019 configuration? If not, please do that, since VS treats those APIs differently.
Otherwise, there's nothing off about the index files... the most likely scenario is that there is a problematic "translation" between VS2019's API call to ProGet, and ProGet's API call to GitLab. There are more than just those index files that are used.
It's most likely a bug on GitLab's end, in that they're doing something against the spec that just "happens to work" in VS2019. We struggled with a very similar bug with GitHub, but their timeline to investigate/fix it was crazy, so we just did a workaround (see PG-1932) and have it mostly working.
Ultimately, the customer decided not to use GitHub in this manner, because the workflow (outside of the API) was painful and GitHub is buggy they said. So there's that. They just publish packages to ProGet directly instead. You may find this workflow better as well.
Anyways... if you're already using the v3 api endpoint in ProGet, we will need to get this reproduced so we can attach a debugger and find the problem.
I understand it's not feasible to provide access... maybe it won't be so bad to set-up a reproduction case with a public repository? We don't know how to use GitLab's packages features, so if you can help set that up, we can attach a debugger and get it tested.
Thanks
