.NET 9 Blazor Server - some static assets are not being cached/fingerprinted

[BieleckiLtd]

Hi.
I'm migrating Blazor Server app to .NET 9 and want to make use of new static assets compression and fingerprinting API. I have changed in Program.cs to app.MapStaticAssets(); and updated links in App.razor to <link rel="stylesheet" href="@Assets["css/prism.css"]" />

But still, some assets are not getting fingerprint and are being pulled on every 'soft' refresh with status code 200, while other (MudBlazor for example) are getting 304 Not Modified. Any idea why?

In fact, after switching to MapStaticAssets() consecutive loads are slightly heavier compared to UseStaticFiles() because files as MudBlazor.min.js are not being fulfilled by memory cache any more:

IIS, Blazor Server, pre-rendering disabled (render mode InteractiveServerRenderMode(prerender: false))

[tossnet]

The packages' static files don't seem to be affected. We have to wait until their authors also implement MapStaticAssets