You can try using Process Monitor as suggested here:

https://superuser.com/a/613743

I haven't tried doing that myself, but perhaps it will help.

Also, there might be a chance of your antivirus interfering with the tweaker. Many times, where there were no other explanation, the antivirus was responsible for various issues. You can try adding the tweaker to the exclusions list and see if that makes any change.

I'm not familiar with such a bug. You can verify that the startup is not disabled in Task Manager. Other than that, it should just work, and if it doesn't then I believe that there's something wrong with your system.

Does the issue happen when 7+ Taskbar Tweaker is not running? Since the issue doesn't happen on the taskbar, it's possible that it's not related to the tweaker.

If it happens only when the tweaker is running, can you check whether it happens when all of the tweaker's options are off? If no, please find the option that causes the issue.

Please make sure that you're using the latest version of the tweaker, v5.11.3.

You can achieve this with the advanced options. Refer to the help file for more information.

See also: Switching between open programs using keyboard

You're not using the latest version of the tweaerk - according to the screenshot, you're using v5.10. Please update to the latest version.

Unfortunately, I can't think of any explanation for this except for the things I already mentioned.

It’s difficult for me to investigate the problem without being able to reproduce it. We can try the following: here are three builds, each with some of the code removed. You can try them all, and report back which ones of the three versions cause the problem. Then I’ll focus on the part which causes the problem, and perhaps will send more builds more focused changes. Hopefully it will help us narrow it down to the root cause.

In this case, perhaps it's related to this problem:

https://tweaker.userecho.com/132-icons-loading-in-taskbar-buttons-somteimes-is-incorrect

Do you experience it when the tweaker is not running? If not, do you see the problem if you turn off all of the tweaker's options? Can you try and find out which option causes the problem?