OnNavigatedTo is not called when navigating from a specific page

[janseris]

Description

OnNavigatedTo on MapsUIPage.cs is never called when visiting from MapPage.cs via Shell navigation and always called when visiting from all other pages.

Reproduction project:
AndroidBluetoothBeaconTest.zip

Steps to Reproduce

1. run app
2. click MAUI Map item in menu
3. click MapsUI Map item in menu - OnNavigatedTo is not called when visiting from that MAUI Map page (MapPage.xaml)

Reproduction video (the breakpoint should be triggered on every navigation to the page but was only triggered when navigating from the "Scan bluetooth devices" page).

repro.mp4

Version with bug

7.0 (current)

Last version that worked well

7.0 (current)

Affected platforms

Android, I was not able test on other platforms

Affected platform versions

Android 12

Did you find any workaround?

no

Relevant log output

No response

[janseris]

It also happens when the MapsUI control usage is completely removed from the page XAML and its code-behind.

[drasticactions]

You have the same route registered twice for different pages. Change the route name for the pages and it should work.

@PureWeen Is this normally allowed? Should it throw if you try and register the same path for different pages?

[janseris]

You have the same route registered twice for different pages. Change the route name for the pages and it should work.

@PureWeen Is this normally allowed? Should it throw if you try and register the same path for different pages?

Hi thanks for pointing it out, that looks like it could be the issue (unintended), I will check

[janseris]

When the route was made unique, the OnNavigatedTo handler started being called correctly.
I think that duplicate route path is an unwanted situation which should be prevented by throwing a runtime exception as @drasticactions suggests because it caused this trouble which took me hours to realize where the problem is.

[janseris]

-> feature request
Throw exception on duplicate route on FlyoutItems in AppShell

[Zhanglirong-Winnie]

Verified this issue with Visual Studio Enterprise 17.7.0 Preview 2.0. Can repro on android platform with sample project.
Android.zip

[BagavathiPerumal]

This issue has been verified in Visual Studio Code 1.104.0 with the latest MAUI version 9.0.110. It can be reproduced on the Android platform.

14000-Android.mov