aspnetcore: CSS isolation error when Blazor component Nuget packaged

@mkArtakMSFT I’m facing one more issue related to CSS. The above mentioned isolated CSS was working with WebAssembly projects when Razor Class Library project was referenced directly. But when it is packaged to Nuget and used via Nuget package not directly from project reference. Got this error:

Severity	Code	Description	Project	File	Line	Suppression State
Error		The scoped css file 'C:\Users\Major\.nuget\packages\majorsoft.blazor.components.loading\0.9.1-rc.1.20452.10\contentFiles\any\net5.0\LoadingPage.razor.css' was defined but no associated razor component was found for it.	Blazor.Components.TestApp (Samples\Blazor.Components.TestApp)	C:\Program Files\dotnet\sdk\5.0.100-rc.1.20452.10\Sdks\Microsoft.NET.Sdk.Razor\build\netstandard2.0\Microsoft.NET.Sdk.Razor.ScopedCss.targets	97	

_Originally posted by @majorimi in https://github.com/dotnet/aspnetcore/issues/26144#issuecomment-697930110_