[Bug] Using Background property animates brush appearance on iOS

[DancesWithDingo]

Description

When the Background brush property is set on a control with IsVisible = false when the page is displayed, the brush will appear animated when visibility is set to true.

Steps to Reproduce

1. Create a ContentPage with the following XAML:

    <Grid ColumnDefinitions="*,*" VerticalOptions="FillAndExpand">
        <Grid Grid.Column="0" x:Name="Right" BackgroundColor="Orange" IsVisible="false"/>
        <Grid Grid.Column="1" x:Name="Left" Background="OliveDrab" IsVisible="false"/>
    </Grid>
   

2. Put this in the code-behind:

` void BackgroundBrush_Clicked(object sender, EventArgs e) {
Left.IsVisible = true;
}

    void BackgroundColor_Clicked(object sender, EventArgs e) {
        Right.IsVisible = true;
    }

`

3. Run, and click each button.

Expected Behavior

Both columns should appear immediately when each button is pressed.

Actual Behavior

The left column appears normally. The right column (using Background property with a SolidColorBrush) animates from the top left to the bottom right.

Basic Information

• Platform Target Frameworks:
  • iOS: 14.5

Environment

Screenshots

Animated GIF attached.