Flyout with FlyoutBehavior="Locked" unlocks (reverts to Flyout) after navigation.

[lendres]

Description

Flyouts set to locked (FlyoutBehavior="Locked") seem to switch to behavior associated with FlyoutBehavior="Flyout" after navigation is performed.

• At application startup, the behavior seems correct.
• After navigating to another page and back, the flyout behavior seems to have changed.
• This behavior seems associated with Maui Controls 9.0.30. The behavior is correct in Maui Controls 9.0.14.

Steps to Reproduce

1. Download the example repository and build the branch maui-controls-9.0.30. Be sure to select this branch, it is not the default.
2. Observed that the flyout is lock.
   
3. Navigate to the second page.
   
4. Navigate back to the first page and observe that the hamburger button is present and the flyout is not locked.
   
5. Observe that the hamburger icon can be clicked to change the flyout to collapsed.
   

Note

Use the branch maui-controls-9.0.14 of the example repository and retest to observe that this behavior was correct in version 9.0.14.

Link to public reproduction project repository

https://github.com/lendres/Maui-Flyout-Unlocking

Version with bug

9.0.30 SR3

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

9.0.14 SR1.4

Affected platforms

Windows

Affected platform versions

10.0.22631 Build 22631

Did you find any workaround?

None is known.

Relevant log output

[kubaflo]

It works fine on Android and iOS, so it is probably Windows only issue

[Zhanglirong-Winnie]

This issue has been verified Visual Studio 17.13 Preview 3(9.0.30 ). Can repro this issue on Windows platform. On 9.0.22 works fine.

[hwsmo]

Please solve the problem promptly, as no workaround can be found so far :(

[hwsmo]

Hi! Unfortunately, this change was not a good solution. Reason: In the delegate "getDefaultNavBarIsVisible" the current FlyoutBehavior value of the _shell is no longer accessed, but rather the previously determined value:

After navigating to another page in the app and navigating back again, the visibility of the drawer toggle button is no longer updated correctly when the FlyoutBehavior is changed from the state "Locked" to "Flyout"

This is exactly the case I have in my app now.