[Bug] Setting IsVisible=true hides views that do not fit on the screen

[IgorKravchenko10]

Description

I have created a page with a big count of views. Some of them do not fit on the screen. I also have a Switch to show/hide some of those views. When I toggle Switch on the views that do not fit on the screen will be invisible.

Steps to Reproduce

1. Create page with several views.
2. Add Switch to show/hide some views.
3. Place some views after views that will be hidden/shown by Switch
4. Toggle switch on to show additional views.
5. Those views will be visible but some views below will dissapear.

Like this:

<ScrollView>
            <StackLayout Spacing="3" Padding="15">
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />
                <Entry Placeholder="Default Text" FontSize="Medium" />

                <Switch IsToggled="{Binding IsAdditionalContentVisible}"></Switch>

                <Entry Placeholder="Additional Entry" FontSize="Medium" IsVisible="{Binding IsAdditionalContentVisible}"/>
                <Entry Placeholder="Additional Entry" FontSize="Medium" IsVisible="{Binding IsAdditionalContentVisible}"/>
                <Entry Placeholder="Additional Entry" FontSize="Medium" IsVisible="{Binding IsAdditionalContentVisible}"/>
                <Entry Placeholder="Additional Entry" FontSize="Medium" IsVisible="{Binding IsAdditionalContentVisible}"/>

                <!--Some of these entries will be invisible-->
                <Entry Placeholder="Text" FontSize="Medium" />
                <Entry Placeholder="Text" FontSize="Medium" />
                <Entry Placeholder="Text" FontSize="Medium" />
                <Entry Placeholder="Text" FontSize="Medium" />
                
                <StackLayout Orientation="Horizontal">
                    <Button Text="Cancel" Command="{Binding CancelCommand}" HorizontalOptions="FillAndExpand"></Button>
                    <Button Text="Save" Command="{Binding SaveCommand}" HorizontalOptions="FillAndExpand"></Button>
                </StackLayout>
            </StackLayout>
        </ScrollView>

Expected Behavior

All views must be visible after toggling Switch on.

Actual Behavior

Those views that are not fit on the screen will be invisible.

Basic Information

• Version with issue: all
• Last known good version: any
• Platform Target Frameworks:
  • Android: 11
• Affected Devices: all

Environment

Show/Hide Visual Studio info

Microsoft Visual Studio Enterprise 2019 (2)
Version 16.10.3
VisualStudio.16.Release/16.10.3+31424.327
Microsoft .NET Framework
Version 4.8.04084

Installed Version: Enterprise

Visual C++ 2019   00433-90000-00004-AA789
Microsoft Visual C++ 2019

ASP.NET and Web Tools 2019   16.10.526.50910
ASP.NET and Web Tools 2019

ASP.NET Web Frameworks and Tools 2019   16.10.526.50910
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0   16.10.526.50910
Azure App Service Tools v3.0.0

C# Tools   3.10.0-4.21318.11+7ceb633154acb9d716fd3eb2b6df1a0468d8e416
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Common Azure Tools   1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

CreateLayoutWizard   1.0
Create layout wizard.

DevExpress Reporting Extension   1.0
A Visual Studio extension that invokes the Report Designer editor for report definition REPX files.

DevExpress.DeploymentTool   1.0
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DevExpress.Win.LayoutAssistant Extension   1.0
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Microsoft Visual C++ Wizards   1.0
Microsoft Visual C++ Wizards

Microsoft Visual Studio Tools for Containers   1.2
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Mono Debugging for Visual Studio   16.10.15 (552afdf)
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ProjectServicesPackage Extension   1.0
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Razor (ASP.NET Core)   16.1.0.2122504+13c05c96ea6bdbe550bd88b0bf6cdddf8cde1725
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SQL Server Data Tools   16.0.62106.24090
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Test Adapter for Boost.Test   1.0
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TypeScript Tools   16.0.30429.2002
TypeScript Tools for Microsoft Visual Studio

Visual Basic Tools   3.10.0-4.21318.11+7ceb633154acb9d716fd3eb2b6df1a0468d8e416
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Visual F# Tools   16.10.0-beta.21262.7+1b23bbeda88ea3cb9be9af777f4c99fa8663df81
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Visual Studio Container Tools Extensions   1.0
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Visual Studio Tools for CMake   1.0
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VisualStudio.DeviceLog   1.0
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Xamarin   16.10.000.234 (d16-10@ecaf29b)
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Xamarin Designer   16.10.0.115 (remotes/origin/c750fbf1bde3c720d077f51640fe197c6dac7cbe@c750fbf1b)
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Xamarin.Android SDK   11.3.0.4 (d16-10/ae14caf)
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Xamarin.iOS and Xamarin.Mac SDK   14.20.0.24 (c4b89cddb)
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Screenshots

Reproduction Link

IsVisibleBugSample.zip

Workaround

Type some text to entry. Then views will be shown.

[holecekp]

For a workaround, see #14918 (comment). The workaround has been proposed originally for another ScrollView bug (#13597) but I have tested that it works also for this issue.

[jfversluis]

@IgorKravchenko10 if you are still with us, a PR (#15067) for this is open now, would you be able to grab the NuGet as described here and let us know if this fixes this issue? That will greatly speed up the review process.

Besides verifying if this particular issue is fixed also be sure to check other scenarios in the same area to make sure that this fix doesn't accidentally has side-effects 🙂

Thanks!

[jfversluis]

This should be fixed by #15076 and part of SR10