Hi ! I have installed plasma 5.8.4 on my archlinux. I too often use postman and pther chrome's applications and each of them in taskbar has only chrome's icon, not native for application. On any other DE (xfce, gnome, unity...) it's ok - postman has itself icon, but doesn't it on kde.

Here is screenshot to demonstrate it weird moment:



On the alt+tab block the icon of postman is ok, but on taskbar it's not. I have icons only taskbar and in settings no any about it.
Also on basic taskbar no options about it too.

Is here any developers of KDE? Or where I can report about bug?

KDE is better DE on my opinion and I want that it will be better in all aspects than all any DEs. Wait for response, thanks, guys.