Blazor server SignalR disconnects when a component is included in both a razor page and a layout page

[ACertainDeveloper]

Describe the bug

Blazor server SignalR disconnects when a component is included in both a razor page and a layout page.

To Reproduce

Steps to reproduce the behavior:

1. Using this version of ASP.NET Core '3.0'
2. Create a new asp.net core web application
3. Add blazor.server.js to layout page.
4. Add MapBlazorHub() and AddServerSideBlazor() to Startup
5. Add a component to both the layout page and a razor page

Expected behavior

Blazor components rendered on razor pages should function normally when a component is included in the layout.

Example App

Example App

[ACertainDeveloper]

Screenshot of error

[mkArtakMSFT]

Thanks for contacting us, @ACertainDeveloper.
@pranavkm can you please look into this? Thanks!