Opacity bug on BoxView.Background

[ShariatPanah]

Description

when i set the background of a boxview to a linear gradient brush, the opacity works on hotreload but when i stop the application and rerun it, the opacity would be ignored like it was never been set, this is my xaml code:

        <BoxView
            HeightRequest="200"
            Opacity="0.3"
            WidthRequest="150">
            <BoxView.Background>
                <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                    <GradientStop Offset="0.4" Color="Transparent" />
                    <GradientStop Offset="1" Color="Black" />
                </LinearGradientBrush>
            </BoxView.Background>
        </BoxView>

Steps to Reproduce

Just create a box view using my code snippet

Link to public reproduction project repository

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android 12.0

Did you find any workaround?

No response

Relevant log output

No response

[ShariatPanah]

i tested on windows and boxview opacity works as expected, so apparently it's boxview's bug in android handler

[maxiking01]

I confirm that problem with BoxView's Opacity appears on Android. On iOS and Windows opacity is applied correctly. I tested on .Net 8.0.1 .

[returnZro]

Is there any work-around for this?

[awasilik]

I can observe the same issue in my application.
There is a workaround but it's unacceptable for me - I need to set the opacity again manually from code after the view is rendered.

[XamlTest]

Verified this on 8.0.6. Repro on Android 14.0-API34, not repro on Windows, iOS 17.2 and MacCatalyst with below Project:
OpacityIssue.zip

[kubaflo]

@awasilik @ShariatPanah this pr might help :) #21322