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It works better with the classic Taskbar. You can also instead do a tweak using Winaero Tweaker for those not comfy with Registry editing: or a Registry tweak to bring back old Taskbar for now. If you insist on using the new taskbar, for now, until Open Shell gets updated, you can use a square Start button to make the button work reliably such as the Windows 2000 logo Start button: First read this topic if you wish to use Open Shell with the classic Taskbar: It applies to Open Shell also, in fact I strongly recommend Open Shell only over Classic Shell.
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