The message box is sometimes blank when using custom blur and crossfade effects

[FreshP-0325]

Describe the bug

The message box is sometimes blank when using custom blur and crossfade effects at the same time.

To Reproduce

Open a message box by running a command in Command Prompt.

mshta vbscript:Execute("msgbox ""Hello World"":close")

Alternatively, you can open Electron desktop applications and access their About information, such as in Visual Studio Code under Help > About.

It is hard to reproduce again, so you might need to attempt trying it multiple times.

However, moving the message box or hovering over any buttons inside will reveal the content.

Screenshots

DWMBlurGlass 2.2.0 will display as a blurred background window with a title bar.

DWMBlurGlass 2.3.0 will display as a transparent window with a frame and a title bar.

Additional information (please complete the following information):

• OS Version: Windows 11 23H2.22631.4541
• Software Version: 2.2.0, 2.3.0

What other third-party software do you use:

• Windhawk

Additional context

None