Thanks for the new advice, but i stick with the first one, coz it is actually what I need. It also makes all Explorer windows show their correct icons and not the default one.

> Is it enough to pin the Notes program to reproduce the problem?

Yes

After some testing i dont think that this is a bug... coz other pinned applications - stay at their location:

It only happens with (installed from MS Store):

, and this app has many standalone windows (notes list, note1, note2.. note N). So I guess, your advice with  "Group by Application ID" is just what needs to be done for such applications.

as you've asked - TBInspector before:

TBInspector after:

AWESOME!

That helped!

Thank you a lot!