Hello!
Kde task switcher displays different icons for some apps (vscodium and octiopi for example), then displayed for the same apps in kde panel. I have Tela iconpack installed through the standard ‘settings’ application.
Can anyone please point me in the right direction?
Log out of the desktop completely. Then press Ctrl+Alt+F2 and log in there with your normal credentials. After logging in, issue the following commands… 
rm -rf ~/.cache/*.kcache
exit
Press Alt+F1 to go back to the GUI login screen, and log in. It should be fixed now.
did not work sadly 