AccentButtonStyle text invisible in High Contrast when clicking the button

[mantaionut]

Description

I've create a button like this
<Button Content="Open RGB Editor" Style="{StaticResource AccentButtonStyle}" Grid.Row="9" Click="OpenPopup_Click"/>
It works fine in dark or light mode but not in HighContrast mode. When in HC mode when pressing the button the text of the button is no longer visible.

Recording.2025-02-05.185603.mp4

Reproduction Steps

1. Create button with style Style="{StaticResource AccentButtonStyle} and some Content="Some text"
2. Switch to High contrast mode
3. Pressing the button the text will no longer be visible.

Expected behavior

Button text is still visible when pressing the button in HighContrast

Actual behavior

Button text is no longer visible when pressing the button in HighContrast

Regression?

No response

Known Workarounds

No response

Impact

No response

Configuration

.net 9.0.1
Windows 11 x64

Other information

No response

[jaimecbernardo]

For some additional context, we've hit this issue in this PowerToys PR, when trying to port one of the utilitites from WPF-UI to .NET 9 WPF.
microsoft/PowerToys#37149

[dipeshmsft]

Thanks @mantaionut @jaimecbernardo for bringing this to our attention. We will take a look at this issue.

[jaimecbernardo]

Thank you @dipeshmsft ,
I see that this was added to the .NET milestone, so we're applying a workaround for the time being:
microsoft/PowerToys@44691d3

[mantaionut]

I also noticed another issue. On Windows 10 hc1 and hc2 when hovering over the buttons the text and background are both white.