List View content becomes invisible In Window platform

[SivakumarVairamuthu]

Description

When updating the CustomViewContent by clearing its children and re-adding them, the ListView inside the CustomViewContent becomes invisible, even though the Button updates correctly. The issue occurs when creating a custom view containing a CustomViewContent with a VerticalStackLayout that includes a ListView and a Button. After clearing and re-adding the children of the CustomView, the ListView becomes invisible, but the Button continues to update as expected.

Sample : ListView.zip

Video : https://github.com/user-attachments/assets/182f4483-9282-422d-b0b8-3b096c2e88e9

Steps to Reproduce

1. Run the sample mentioned in the description.
2. Click the 'UpdateCustomContentView' button.
3. The List View content becomes invisible.

Expected Result:

• Both List View content and Button should remain visible.

Actual Result:

• List View content becomes invisible
• Button remains visible.

Link to public reproduction project repository

No response

Version with bug

9.0.21 SR2.1

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

Windows 10.0.19041.0

Did you find any workaround?

No response

Relevant log output

[RoiChen001]

I can repro this issue at Windows platform on the latest 17.13.0 Preview 2.1(9.0.14 & 9.0.21).

[prakashKannanSf3972]

@SivakumarVairamuthu ,

As a workaround, introduce a slight delay using await Task.Delay(20) during the process of re-adding the ListView to the layout. This delay allows the UI to process the changes correctly, helping resolve issues with data context and visibility. It ensures that the ListView reloads its items and functions as expected.

public async void UpdateContentView()
{
  this.parentGrid.Children.Clear();
  if (this.CustomContentView != null)
  {
      await Task.Delay(20);
      this.parentGrid.Children.Add(this.CustomContentView);
  }
}

[Eskissimo]

Hello,

In addition and for investigation, i get the same kind of issue on Android platform with some devices. I will try to give a sample project next week (in another issue).

I use Scrollview with BindableLayout VerticalStackLayout. The items become invisible when i have more 50 items on the first load.

Regards.

[Eskissimo]

Version 9.0.30 doesn't solve issue.