First, here's all the info that I can think of that may be pertinent: 

Skin: Windows Classic Theme by Isam Bitar

Windows and WindowBlinds Versions: (copied from WindowBlinds)

Windows 11 Core 22H2 (22621.ni_release.220506-1250)

WindowBlinds 11.02 (017 x64 - Windows 11 Edition) - 64 bit OS

Window titlebar blur features are enabled on this operating system

        Wblind.dll                2023/03/22 08:40:48

        Wblind64.dll              2023/03/22 08:40:27

        Wbsrv.dll                2023/03/22 08:40:33

        WB11Config.exe            2023/03/22 08:40:50

        Wbload.dll                2023/03/22 08:41:38

        Screen10.exe              2023/03/22 08:40:45

Edge version: 115.0.1901.200 (official build) (64-bit) - up to date as of 8/10/23

Brave version: 1.56.20 Chromium 115.0.5790.171 (Official Build) (64-bit) - up to date as of 8/10/23

I believe have properly removed the Windows 10 custom titlebar from Edge and Brave and only use those shortcuts to open the programs. The theme for both programs has been reset to default. 

As seen in the attached image below, the skin can be seen behind each browser window, but the tabs cover the titlebar. This happens in Edge and Brave every time. The partial visible skins also occasionally show the desktop background through gaps between the skin and the browser. I have restarted both programs, reapplied the skin, and restarted the computer several times. Any help would be greatly appreciated!