[iOS 26] CornerRadius property getting ignored/overriden on sdk 26

[MitchBomcanhao]

After updating the build process to use xcode 26, all instances of content button controls are now rendering incorrectly, with the CornerRadius property getting ignored and overriden by some default value, meaning that all uses of the property result in the same rounded corners being applied.
interestingly, when debugging, the page initially appears with the incorrect CornerRadius values, but if you manually edit the value it'll get applied under hot reload, so it is not like the property is entirely disconnected.

            <mcb:ContentButton BackgroundColor="Red" CornerRadius="0" HeightRequest="100">
                <Label Text="this should have square corners - CornerRadius=0" />
            </mcb:ContentButton>

            <mcb:ContentButton BackgroundColor="DarkOrange" HeightRequest="100">
                <Label Text="this should have square corners - CornerRadius is unset" />
            </mcb:ContentButton>

            <mcb:ContentButton BackgroundColor="LightPink" CornerRadius="25" HeightRequest="100">
                <Label Text="this should have slightly round corners - CornerRadius=25" />
            </mcb:ContentButton>

            <mcb:ContentButton BackgroundColor="LightBlue" CornerRadius="500" HeightRequest="100">
                <Label Text="this should have very round corners - CornerRadius=500" />
            </mcb:ContentButton>

the above xaml results in the following UI

Thoughts, workarounds?

[MitchBomcanhao]

I have found a possible workaround

add a new handler in the iOS platform folder

    public partial class MyContentButtonHandler : ContentButtonHandler
    {
        protected override void ConnectHandler(UIButton platformView)
        {
            base.ConnectHandler(platformView);

            if (this.PlatformView is UIView nativeView && VirtualView is ContentButton viewWithRadius)
            {
                nativeView.CornerConfiguration = UICornerConfiguration.CreateCapsule(viewWithRadius.CornerRadius);
            }
        }
    }

and add a new handler registration in MauiProgram.cs#CreateMauiApp

#if IOS
            if (OperatingSystem.IsIOSVersionAtLeast(26))
            {
                builder.ConfigureMauiHandlers(handlers =>
                {
                    handlers.AddHandler<ContentButton, YourNamespace.MyContentButtonHandler>();
                });
            }
#endif

note that with this workaround the corner radius still is wrong if you set corner radius to zero:

[MitchBomcanhao]

larger corner radius values also seem to get clipped