Start10 should not be causing a glitch on the taskbar other than mispositioning some buttons if you have a very large start button (which is unlikely). This is all that the update will alter in Start 10.
If the right hand end of the taskbar is being corrupted you are probably running other software which is triggering this.
Are you running one of Stardock Fences, Stardock Groupy, Stardock WindowFX? The issue is also shown with a number of other software utilities running such as Microsoft Spy++. It is not shown with Start10 itself.
The issue will only happen if the computer is running at > 100% scaling and you have hidden that silly News and Interests link on the taskbar.
I would urge everyone to avoid that buggy Microsoft patch if at all possible.
If anyone is using it, upvote this https://aka.ms/AAcr4gx