The window name and user visible name are not used in the app identification heuristic, so a change here cannot result in the icon, app id, app name, generic name, PID or launcher changing.

Changed files in Qt Creator, noticed that it also erroneously signals a geometry change, when I ignored that, I verified that it was the name change code path updating the label and not the geometry one (which also nukes app info cache)

Also verified that the icon isn't always signalled to have changed just because the window name changed (can be expensive for apps where we don't know the service and have to query the window icon)

Inspected TaskTools namespace and didn't find any use of KWindowInfo (and as such no use of window name/visible name)