"Middle click to close" on a Windows 10 App causes the app to close and reopen

I've seen this bug in several versions of 7+ Taskbar Tweaker. If middle click option is set to Close and you middle click on a Windows 10 App (e.g.: Settings, Calculator, Mail) taskbar icon, the app closes but almost every time it reopens immediately, and if you middle click again it does this for one or two more times until it finally closes.