The title bar display style is abnormal

[LHTXQ]

Describe the bug

When the window material is not set to None, the title bar displays a line of theme color. The problem appears to have arisen after an update to the system.

To Reproduce

See “WPF UI Gallery".

Expected behavior

With the window material applied, the title bar should look like this:

Screenshots

WPF UI Gallery:

My App (As you can see in the image below, only the active window appears incorrectly):

OS version

Version Windows 11 Professional Workstation Edition
Version 22H2
The installation date ‎ 2022-11 - ‎ ‎ 17
Operating system Version 22621.963
Experience Windows Feature Experience Pack 1000.22638.1000.0

.NET version

.net 6.0.2

WPF-UI NuGet version

2.0.3

Additional context

No response

[LHTXQ]

In addition, I think the TreeView highlighted rectangle should have rounded corners.

[pomianowski]

As for TreeView, rounding has been added in the development branch

[pomianowski]

The large color bar at the top is due to the fact that the "Show accent color on title bars and windows borders" function is enabled. Will need to fix the non client area.

[LHTXQ]

The large color bar at the top is due to the fact that the "Show accent color on title bars and windows borders" function is enabled. Will need to fix the non client area.

Maybe I get it.

[ChainsLunatic]

Does anyone know any work arounds besides deactivating the backdrop? It's a rather frustrating bug because deactivating the backdrop does not give any clue about window focus anymore.

[niels9001]

Can someone verify if this issue is still present on the latest preview.10?