Xaml gradient issue in uwp for some devices

problem ：

I'm using Page as landing screen in my app. I use in my application Page As login screen .XAML looks like this:XAML It looks like this ：

<Grid x:Name="LayoutRoot">    <Grid>        <Grid.RowDefinitions>            <RowDefinition Height="3*"/>            <RowDefinition Height="Auto"/>            <RowDefinition Height="Auto"/>            <RowDefinition Height="7*"/>        </Grid.RowDefinitions>        <Rectangle StrokeThickness="0" Fill="#FF79D2F4" Margin="0,0,0,-10" Grid.RowSpan="2"/>        <Rectangle StrokeThickness="0" Fill="#FF1F8CC5" Margin="0,-10,0,0" Grid.Row="2" Grid.RowSpan="2"/>        <Image Source="ms-appx:///Assets/ViewMedia/Banners/Banner_Light_Big.jpg" Grid.Row="1" Grid.RowSpan="2"/>        <Rectangle StrokeThickness="0" Grid.Row="2" Grid.RowSpan="2">            <Rectangle.Fill>                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">                    <GradientStop Offset="0"/>                    <GradientStop Color="#7F000000" Offset="1"/>                </LinearGradientBrush>            </Rectangle.Fill>        </Rectangle>    </Grid>    <StackPanel MaxWidth="300" Margin="20,35"                HorizontalAlignment="Stretch" VerticalAlignment="Bottom">        <Button x:Name="LoginButton" x:Uid="LoginButton" Style="{StaticResource BrandButtonStyle}" Margin="0,5"                Click="LoginButton_Click"/>        <Button x:Name="RegisterButton" x:Uid="RegisterButton" Style="{StaticResource BrandButtonStyle}" Margin="0,5"                Click="RegisterButton_Click"/>    </StackPanel></Grid>

I've got 3 devices on which I'm running the app: I have a 3 Devices are running applications ：

• Microsoft Lumia 950 XL [ M ] Microsoft Lumia 950 XL [ M ]
• Custom build PC [ PC ] Custom build PC [ PC ]
• Lenovo ThinkPad Tablet 2 [ T ] lenovo ThinkPad The tablet 2 [ T ]

When running the app this page renders well on M and PC but on TGradient and two Button s at the bottom are not rendered at all. When running the application , This page is on M and PC Good performance on , But in TGradient On , Two at the bottom Button It doesn't appear at all .I don't see them but I can press Button s and their tap event handlers will strike. I didn't see them , But I can press Button , Their click event handler will hit .But if I comment Rectangle with gradient everything is fine on all devices. But if I use gradients to comment Rectangle , Then everything on all the devices is fine .

This is how the app looks on T when using gradient. This is when the application uses gradients T Upper appearance .No buttons. No buttons .And gradient is also not visible. And the gradient is not visible .

This is how the app looks on T without gradient. This is the application without gradients in T Upper appearance .Buttons are in place. The button is in place .

And this is how it should look running on PC . This is how it should be PC On function .Buttons and gradient are visible. Buttons and gradients are visible .

I don't see any errors in output when running the app. When running the application , I don't see any errors in the output .I don't know why this happens only on specific devices. I don't know why this happens only on specific devices .Maybe this is kind of known issue? Maybe this is a well-known problem ？

UPDATE 1 to update 1

From users feedback, I can say that this bug hits only Atom-powered devices. From user feedback , I can say this bug Only attack Atom Driven devices .But I'm not sure if this is 100% true for all Atom-powered devices. But I'm not sure this is for all Atom Whether the driven equipment 100％ real .

UPDATE 2 to update 2

I'd updated T with W10 from Insider Preview Fast Ring. I use Insider Preview Fast Ring Of W10 Updated T.The bug is in place. This bug It's in place .So this is not connected to OS builds. therefore , This is related to OS Construction is irrelevant .

UPDATE 3 to update 3

Switching Button s Style back to normal does not solve this. Switch Button Of Style Returning to normal will not solve this problem .So Style is good, it's not the cause.Style very good , It's not the reason .

---

Solution ：

Reference resources ： https://stackoom.com/en/question/2PvGp