File uses the type uri. Which has caused weird problems before, because the file URI isn't actually a valid URI. There are validation problems and so on.
The UriItem field type uses uri_link as the default formatter. But that is not compatible with public:// / private://
Switch to use string? Maybe actually support stream wrappers in fromUri() ?
Postponed: needs info
9.5
The change is currently missing an automated test that fails when run with the original code, and succeeds when the bug has been fixed.
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
Just looking at the file sizes #18 quadrupled the size of the original patch..why is that? Issue summary should include those additional changes.
This needs steps to reproduce for D10 also.
Once that's done a test case will be needed.