[12.2-Kde 4.9.1]Icon Task Launcher is not working properly

Hi, I added the widget Icon Tasks to the panel.
Problem is that I set some icons as permanent (quick-launcher ) on the panel.
When I launch the application, I expect the icon of the application started to be the same as the icon that launched the application (to avoid useless duplication on the panel).
Instead I get a second icon on the panel.
This should not happen , I think as with Chakra it works exactly as I would expect it to work.
I checked the settings on the widgets settings, and checked the options “Always use the launcher icons”.
This is supposed to fix my problem and have the launcher behave the way I want, but it doesn’t.

Do you get the same issue as me?
Does anybody has a solution to fix the problem?