Android Maui tap event pass through containers

[mmuresan]

Description

In Maui Android, the Touch event is passing through any container, such as Grid, StackLayout, BoxView and so on, as long as there is no TapGestureRecognizer attached to the container.
In Windows this is not happening.
This is an inconsistent behavior in Maui, between platforms

Steps to Reproduce

1. Create a new Maui app
2. Modify the MainPage to a Grid container
3. Add multiple Grid container one on top of the other (no rows or columns defined)
4. Add buttons on each sub-grid. Make sure they are all visible
5. Add a background and Opacity set to 0.1 for all sub-grids
6. Add Clicked events for each button or add a view model to handle the commands for each button
7. Display an alert to automatically see what button is tapped
8. Tap any of the buttons

In Android only:
Observe that the buttons can be tapped, no matter what layer (Grid) is the button contained in
In Windows, this is not happening.

Expected to have a consistent behavior in all platforms

Link to public reproduction project repository

https://github.com/mmuresan/androidmauitouchthroughbug

Version with bug

9.0.70 SR7

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

All supported Android platforms

Did you find any workaround?

The only workaround is to add in the top grid, under any control contained in that grid, a BoxView control and attach a TapGestureRecognizer to that BoxView control. This way it will catch all taps that are not directly over a control, such as buttons, Entry, and so on.

Relevant log output

No log required

[similar-issues-ai]

We've found some similar issues:

• Buttons behind "Pop-Up" are handling taps in Android, which is different than Windows behavior (and Xamarin) #11663 , similarity score: 83%
• [Android] Tap through grid #21695 , similarity score: 83%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

Note: You can give me feedback by 👍 or 👎 this comment.

[NafeelaNazhir]

This issue has been verified in Visual Studio Code 1.100.3 with .NET MAUI versions 8.0.100, 9.0.0, 9.0.50, 9.0.60, 9.0.70, 9.0.71. It can be reproduced on the Android Platform.

[mmuresan]

The "similar-issues-ai" is pointing out some duplicates, that are very old and still not fixed after all these years.
So, there are a lot of "duplicates", similar to this issue, for different controls and this bug is also reported for iOS.
This bug was/is reported by many developers, since 2023. The suggested similar issues are actually pointing to one old issue, reported first in 2023, and it is now closed (and still not fixed).
Our old Xamarin app (that was migrated to Maui) works fine, so this issue does not exist in Xamarin.
It happens only in Maui.