From your screenshot, it appears you are using Classic Shell. Does the problem go away if you uninstall Classic Shell?
If I exit Classic Shell to the Windows 10 start menu, the problem persists. To test the uninstall, I would like to use a virgin Windows 10 VM that has neither Classic Shell nor WindowBlinds installed. I'd then install WindowBlinds alone and see if the problem persists. How would that work regarding the WindowBlinds license?