Handling multiple Shells

[Sztub]

In my app i had two Shells, LoginShell and MainShell. My app used to work perfectly when switching between them by setting:

Shell.Current.Window[0].Page = new MainShell();

This approach had always worked fine in previous .NET versions. But after the upgrade, the physical back button on Android devices stopped working entirely once I change shell to LoginShell after logout .

I can’t find any clear documentation saying whether swapping the root Shell like this is actually a supported approach in .NET MAUI — and now I’m not sure anymore. AI models still keep suggesting it as a valid solution for handling multiple flyout menus, but given the issue I’m seeing, I’m starting to doubt that it’s recommended.

So my question is: Is changing the Shell like this still considered a supported pattern, or should it be avoided on newer .NET/Android versions?

Also, i can see new warning when switching the shell:
Warning - Window already had an alert manager subscription, but a new one was requested. Not going to do anything.