Maui: [BUG] Snackbar background color not working on iOS 13.3.1.

Is there an existing issue for this?

• I have searched the existing issues

Did you read the “Reporting a bug” section on Contributing file?

• I have read the “Reporting a bug” section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

Even if you specify the Snackbar’s BackgroundColor, it will not be colored in iOS 13.3.1. Works as expected on iOS 16.3.

Expected Behavior

Even in iOS 13.3.1, if Snackbar’s BackgroundColor is specified, it must be colored.

Steps To Reproduce

Please follow the steps below to reproduce.

1. Press the Show Snackbar button on MainPage.

iOS 13.3.1 displays a snackbar with a transparent background color.

Link to public reproduction project repository

https://github.com/cat0363/MauiComm-IssueSnackbar.git

Environment

- .NET MAUI CommunityToolkit: 5.1.0
- OS: Windows 11 Build 22621.1555
- .NET MAUI: 7.0.81
- Target Device OS: iOS 13.3.1

Anything else?

I tried to show a snackbar with background color set like below, but the background color doesn’t work on iOS 13.3.1.

// Create Snackbar
var snackbar = Snackbar.Make(
    "This is test message.",
    action: null,
    actionButtonText: string.Empty,
    duration: new TimeSpan(0, 0, 0, 0, 3500),
    visualOptions: new CommunityToolkit.Maui.Core.SnackbarOptions() {
        BackgroundColor = Colors.Red,
        TextColor = Colors.White 
    },
    anchor: null
);

// Display Snackbar
snackbar.Show();

The above code works as intended on Android, but not on iOS 13.3.1.

In iOS 13.3.1, the background color is displayed as transparent, but in iOS 16.3, it is displayed with the specified background color.

[iOS 13.3.1]

[iOS 16.3]