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Thank you for the detailed reproduction steps. I'm aware that the virtual_desktop_order_fix option doesn't always work. As far as I know, it works well when grouping is disabled, and doesn't work when grouping is enabled for grouped items which are spread between virtual desktops (like in your example, the explorer group which is spread between VD 2 and 3).
See also the discussion here:
https://rammichael.com/7-taskbar-tweaker/comment-page-40#comment-10468
As I wrote in the comments in the link above, I'd like to look at it one day but don't plan to do that in the near future.
The core of the issue is that when labels aren’t displayed, and either there’s only one item in the group, or the group is combined, the “group icon” is used instead of the actual window icon. Currently 7+ Taskbar Tweaker doesn’t provide a way to customize this behavior.
You probably meant 102, not 104 in the title? Please see my reply here.
Closing since the issue is very old, no other users reported about it, and the investigation stopped. If the issue is still relevant and you have more information, or would like to try other things to try and understand what's going on, let me know and I'll reopen the issue.
Closing due to a lack of feedback.
I'm not familiar with the issue. I'll look at it when I have some spare time.
Sorry, but I don't speak Chinese, and I wasn't able to understand the text with Google Translate. Please clarify the issue/suggestion in English.
Unfortunately 7+ Taskbar Tweaker can't solve this currently. It's relevant to the following post, except that the other behavior is desired there (having the window icon, not the pinned icon):
Customer support service by UserEcho
You're probably experiencing the incompatibility caused by the KB4517211 update. The latest version of the tweaker, v5.7.1, fixes compatibility with this update. Please make sure that you're using the latest version of the tweaker, and let me know if you need more help.