[WebToolsE2E] Blazor WebAssembly (Global) project: Page layout breaks after CSS changes and app restart.

**REGRESSION INFO**: Not a regression, reproduced in VS 18.4.0

Doesn't repro with Blazor Server (Global)
Doesn't repro with Blazor WebAssembly (Per page/component)
Repro with Blazor Auto (Global)
Repro with hot reload disabled in VS Settings.
Doesn't repro with 'dotnet run' and 'dotnet watch'.

**INSTALL STEPS**

1. Clean Win11 x64 25h2 ENU
2. Install VS 18.5 Insiders 1 latest released version, Web workload

**REPRO STEPS**

1. Create a new 10.0 Blazor Web App ~ WebAssembly + Global project in Visual Studio.
2. Run the project.
3. Modify the MainLayout.razor.css file in the project and save the changes. E.g. Modify the background-color in line 16.
4. Stop debugging.
5. Run the project again.
6. Observe the page in the browser.

**ACTUAL**

An unhandled error has occurred. Reload doesn't work.

Click "About" on the webpage.

**EXPECTED**

After restarting the app, the page should load successfully and reflect the latest CSS changes.