Blazor WASM Lazy Loading from a lazy loaded assembly don't update route table

Describe the bug

When we lazy load an assembly an navigate to a 2nd lazy loaded assembly the 2nd assembly is well loaded but the route is not found.

To Reproduce

The code is here

Create a solution with dotnet new blazorwasm -ho -au Individual
Add 3 Razor class libraries LazyLoad1, LazyLoad2 and NotLazyLoaded
Move Index.razor and Authentication.razor in NotLazyLoaded
Move Counter.razor in LazyLoad1
Move FetchData.razor" in LazyLoad2*
Update App.razor to lazy load LazyLoad1 and LazyLoad2 but not NotLazyLoaded:

@using System.Reflection
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.WebAssembly.Services
@inject LazyAssemblyLoader _assemblyLoader

<CascadingAuthenticationState>
    <Router AppAssembly="@typeof(Program).Assembly"
            AdditionalAssemblies="@_lazyLoadedAssemblies" OnNavigateAsync="@OnNavigateAsync">
        <Navigating>
            <div style="padding:20px;background-color:blue;color:white">
                <p>Loading the requested page&hellip;</p>
            </div>
        </Navigating>
        <Found Context="routeData">
            <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)">
                <NotAuthorized>
                    @if (!context.User.Identity.IsAuthenticated)
                    {
                        <RedirectToLogin />
                    }
                    else
                    {
                        <p>You are not authorized to access this resource.</p>
                    }
                </NotAuthorized>
            </AuthorizeRouteView>
        </Found>
        <NotFound>
            <LayoutView Layout="@typeof(MainLayout)">
                <p>Sorry, there's nothing at this address.</p>
            </LayoutView>
        </NotFound>
    </Router>
</CascadingAuthenticationState>
@code {
    private readonly List<Assembly> _lazyLoadedAssemblies = new List<Assembly>
    {
            typeof(NotLazyLoaded.Index).Assembly
    };

    private Task OnNavigateAsync(NavigationContext args)
    {
        var path = args.Path;
        if (path.StartsWith("counter"))
        {
            return LoadAssemblyAsync("LazyLoad1.dll");
        }

        if (path.StartsWith("fetchdata") || path.StartsWith("param"))
        {
            return LoadAssemblyAsync($"LazyLoad2.dll");
        }

        return Task.CompletedTask;
    }

    private async Task LoadAssemblyAsync(string assemblyName)
    {
        var assemblies = await _assemblyLoader.LoadAssembliesAsync(
            new[] { assemblyName }).ConfigureAwait(false);
        _lazyLoadedAssemblies.AddRange(assemblies.Where(a => !_lazyLoadedAssemblies.Any(l => l.FullName == a.FullName)));
    }
}

Add services.AddScoped<LazyAssemblyLoader>(); in LazyLoading.Server/Startup.cs
Update LazyLoading.Client.csproj for lazy loading and project reference

<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">

    <PropertyGroup>
        <TargetFramework>net5.0</TargetFramework>
    </PropertyGroup>

    <ItemGroup>
        <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="5.0.0-rc.2.20475.17" />
        <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="5.0.0-rc.2.20475.17" PrivateAssets="all" />
    </ItemGroup>

    <ItemGroup>
        <ProjectReference Include="..\LazyLoad1\LazyLoad1.csproj" />
        <ProjectReference Include="..\LazyLoad2\LazyLoad2.csproj" />
        <ProjectReference Include="..\LazyLoadShared\NotLazyLoaded.csproj" />
        <ProjectReference Include="..\Shared\LazyLoading.Shared.csproj" />
    </ItemGroup>

    <ItemGroup>
        <BlazorWebAssemblyLazyLoad Include="LazyLoad1.dll" />
        <BlazorWebAssemblyLazyLoad Include="LazyLoad2.dll" />
    </ItemGroup>

</Project>

Add necessary references and import in LazyLoad1, LazyLoad2 and NotLazyLoaded
Add a component with @page directive in LazyLoad2

@page "/param"
@page "/param/{param}"
<h3>@Param</h3>

@code {
    [Parameter]
    public string Param { get; set; }

}

Add an input and a button in LazyLoad1/Counter.razor to navigate to LazyLaod2 with a route param

@page "/counter"
@inject NavigationManager _navigationManager
<h1>Counter</h1>

<p>Current count: @currentCount</p>

<button class="btn btn-primary" @onclick="IncrementCount">Click me</button>

<input @bind="value"/>
<button class="btn btn-primary" @onclick="Navigate">Lazy load with param</button>

@code {
    private int currentCount = 0;
    private string value;

    private void IncrementCount()
    {
        currentCount++;
    }

    private void Navigate()
    {
        _navigationManager.NavigateTo($"/param/{value}");
    }
}

Launch the application. Create a user if needed
Click on counter : LazyLoad1 is loaded
Enter a value in the text box and click the Lazy load with param button LazyLoad2 is well downloaded but Sorry, there's nothing at this address. is displayed

Further technical details

ASP.NET Core version 5.0.0-rc.2

Include the output of dotnet --info


.NET SDK (reflecting any global.json):
Version:   5.0.100-rc.2.20479.15
Commit:    da7dfa8840

Runtime Environment: OS Name: Windows OS Version: 10.0.19041 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\5.0.100-rc.2.20479.15\

Host (useful for support): Version: 5.0.0-rc.2.20475.5 Commit: c5a3f49c88

.NET SDKs installed: 2.2.207 [C:\Program Files\dotnet\sdk] 3.1.300-preview-015095 [C:\Program Files\dotnet\sdk] 3.1.300 [C:\Program Files\dotnet\sdk] 3.1.403 [C:\Program Files\dotnet\sdk] 5.0.100-rc.2.20479.15 [C:\Program Files\dotnet\sdk]

.NET runtimes installed: Microsoft.AspNetCore.All 2.1.21 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.21 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.0-rc.2.20475.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.21 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.0-rc.2.20475.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.0-rc.2.20475.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET runtimes or SDKs: https://aka.ms/dotnet-download


- The IDE : Microsoft Visual Studio Community 2019 Preview
   Version 16.8.0 Preview 5.0

dotnet / aspnetcore