CommunityToolkit.Popups and Shell doesn't like each other

Description

After debugging and investigating some bugs on PopupView control I realized that most of the bugs are caused when the dev uses Shell, what’s sad because Shell is the new way to go for mobile apps with .NET MAUI. Otherwise, if the MainPage is a regular ContentPage or a NavigationPage everything works as expected.

In this bug when I open the popup directly on the first page its content disappears (iPhone) or the app crashes (macOS).

During my debug sessions I couldn’t find anything that could indicate that issues are on my end (but I don’t discard this possibility), and the PopupView behaves differently depending on the scenario, so I’m opening a bug report here to ask for some help to see if maybe there’s something on Shell.

Reproduction:

MauiTestApp.zip

Steps to Reproduce

1. Open the attached project
2. Open the MainPage.xaml.cs
3. Follow the instructions on the page

Version with bug

6.0 (current)

Last version that worked well

Release Candidate 2

Affected platforms

iOS, macOS

Affected platform versions

iOS 15.5

Did you find any workaround?

They are described on the repro.

Relevant log output

On iOS:

2022-06-10 20:50:24.171262-0300 MauiTestApp[14632:3865149] [Presentation] Presenting view controller <CommunityToolkit_Maui_Core_Views_MauiPopup: 0x7fbad142d0d0> from detached view controller <Microsoft_Maui_Platform_PageViewController: 0x7fbacfc3c830> is discouraged.

[CristiSandu]

I had the same problem on IOS, but in my case the problem of the crash was not the shell, in the Popup the main layout need to be given a height and width.

[pictos]

Hey @EPS-Lac, Shane and I discussed the current implementation for the MCT popup and he suggested changing the ViewController that we’re using. I’m working on that right now and should have feedback during the weekend. If the suggestion works then the fix will be on MCT if not will need more investigation.