NavigationBackButtonNormalStyle is wrong when used directly

[miksalmon]

Describe the bug

Using NavigationBackButtonNormalStyle directly does not apply the correct style:

• Corners are not rounded
• Wrong font size
• etc.

Repro app: https://github.com/miksalmon/NavigationBackButtonStyleIssue

Steps to reproduce the bug

1. Create button
2. Add style: Style="{StaticResource NavigationBackButtonNormalStyle}"

Expected behavior

Button should have the same style as NavigationView back button

Screenshots

using style directly:
using copied style:
expected:

NuGet package version

None

Windows version

No response

Additional context

Copying the style from https://github.com/microsoft/microsoft-ui-xaml/blob/winui3/release/1.4-stable/controls/dev/NavigationView/NavigationBackButton.xaml locally applies the correct style as shown by the 2nd screenshot

[MartinZikmund]

I can confirm I'm seeing this issue as well, copying the style directly resolves the issue. It seems the correct style (from NavigationView control's styles) is overriden by the one in dxaml\xcp\dxaml\themes\generic.xaml