Sent a link to both files, same issue, only 3 icons being shown are Touch Keyboard, Network, and Sound, all Windows System Icons, and the issue seems intermittent.
Crowding only occurs on the icon closest to the ^ (expand systray arrow) which is always the keyboard icon being crowded/duplicated.
Changing the taskbar icon arrangement does not prevent the issue from occurring, nor does changing to or from a custom start icon.
This issue exists on the 4 systems I currently run the Steam version of Start11 on, and has been an issue since day 1.
In addition to Start11, I also use a paid Steam version of Stardock Fences on all 4 machines. I have also exported the Fences registry export as well.