Hi John,
Thanks for your patience.
We have confirmed that the reported issue with File Manager only occurs when the Authorization code is included in Blazor application. We face similar issue with Http Client call in default Blazor application as well. We have raised queries regarding this Http Client issue in general forums. We will track those forums to proceed further on this issue. We will also reach you, if we get any solution regarding this issue.
We request you to track the general blog for updates regarding this issue.
Regards,
Shameer Ali Baig S.