Microsoft Windows 10 Pro
Version 21H1 (OS Build 19043.1023)
Here's what I been through so far. Downloaded and ran Fences ver. 3.10 (Beta). So far, so good. Decided to run Object Desktop to see what happens. Right side of Taskbar (clock, date, etc.) disappears. Uninstalled Object Desktop. Got clock and all back. I then decided to run Groupy, and Groupy must had decided to group the clock, date, and icon on the Taskbar to the far right of the Taskbar. I uninstalled Groupy, and everything returned to normal. I think I'll stick with just Fences for now.
This isn't Groupy being silly, but a bug in a preview patch you have installed on your computer.
Microsoft have been informed.
The issue with the clock, date and icons on the taskbar can also be triggered by having Fences installed, WindowFX running or having no Stardock software installed. It does not happen for everyone either.
The key things to make it happen are 1) running a non 100% scaling on your primary monitor and 2) Hiding the taskbar news and interests area.