[net9.0] Blazor MAUI App hangs during back navigation because of disconnect code

[PureWeen]

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Description

With NET9.0 we now call "DisconnectHandler" by default on all components of a page when they are popped from the stack.

It looks like this code is now causing the UI to hang

Reproduction

• Deploy a to Windows our Maui.Samples project from the MAUI repository
• Navigate to the Blazor Sample
• wait for it to load
• click the back button
• app hangs

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Closed similar issues:

• ContentPage does not call DisconnectHandler when navigating back (#15410), similarity score: 0.75

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[malsabi]

Is there a workaround for this? I'm having this issue in BlazorWebView I'm targeting 8.0.82 SR8.2. The issue happens In Windows, I tested on Android its working fine.

[malsabi]

@PureWeen @Eilon @mkArtakMSFT If possible please to add this into the SR9.2 release.

[malsabi]

I also tested on iOS the issue is there as well. My app hangs forever.

[malsabi]

@Eilon Maybe this information will help, but the reason why its working on Android is because I have set this:

AppContext.SetSwitch("BlazorWebView.AndroidFireAndForgetAsync", isEnabled: true);

If i removed it and tested again the app will hang just like Windows and iOS.

[Eilon]

Thanks, will investigate this.