Taskbar suddenly transparent after Windows update

Did a restart last night after noticing some Windows update been done. After login Windows, the taskbar suddenly become transparent. I have tried to change the transparency effects but it seems does not fix it. 

After googled around, some users reported the Windows update on OS Build 22631.3296 might have caused this and uninstalling KB5035853 seems able to fix this.

Another alternative, which I personally chose, was to download and install the EP V 22621.3296.64.1 Pre-Release. This seems to fixed this issue as well. You can download it here – https://github.com/valinet/ExplorerPatcher/releases

Good luck.