Closing as a duplicate of:

https://tweaker.userecho.com/topics/294-never-combine-hide-label-vs-dont-combine-grouped-buttons-in-regard-to-taskbar-icons

Here you go, enjoy:

https://github.com/m417z/7-Taskbar-Tweaker

Announced here:

https://rammichael.com/7-taskbar-tweaker-is-ten-years-old-today

It's a different issue. You're using an old insider build of Windows 10 version 20H1. 7+ Taskbar Tweaker supports build 18963 (and maybe newer builds), while you're using 18895. Unfortunately I can't support all insider builds since it's a moving target, it's a lot of work already to only support the latest build.

Please try the latest beta, v5.7.1.1, and let me know whether it works. The latest Windows version build numbers are a bit of a mess, but I think I got it right this time.

I couldn't reproduce it. A recording of me trying is below.

Do you have taskbar animations turned off? Are you using the virtual_desktop_order_fix advanced option?

Closing due to a lack of feedback

Fixed in 7+ Taskbar Tweaker v5.7.1

Fixed in 7+ Taskbar Tweaker v5.7.1

Please try to download it again, I believe that you downloaded a cached version of v5.7.0.5, since you replied right away.

Please try 7+ Taskbar Tweaker v5.7.0.6 beta, it should fix the issue.