IValueConverter with x Bind has ConvertBack method with targeType always null

[FrozDark]

Current behavior

Second argument of type is always null when converting back to control
public object ConvertBack(object value, Type targetType, object parameter, string language)

In the repro it's first TextBox control

Expected behavior

Type to convert to

How to reproduce it (as minimally and precisely as possible)

UnoIssue.zip

Workaround

Consider to know the type you are intended to convert

Works on UWP/WinUI

Yes

Environment

No response

NuGet package version(s)

Uno.Sdk: 5.5.56

Affected platforms

WebAssembly, Android, iOS, Mac Catalyst, Skia (Linux X11), Skia (macOS), Skia (Linux Framebuffer), Skia (GTK)

IDE

Visual Studio 2022

IDE version

No response

Relevant plugins

No response

Anything else we need to know?

Tested on android but I think it's related to codegeneration of xaml and affects all uno platforms