Icons on panel just show "a qube" instead of its application's icon. (minimal template)

I’ve create a minimal template and installed some packages.

But when I start the application of this template or its appvm, the icons just show “a qube” instead of the application’s icon (in both of the panel and alt+tab ). In normal, the “qube” icon should be the icon of the selected application (like firefox, file manager, terminal).

I thought that it missed packages qubes-menus and qubes-desktop-linux-common then install them, but they do nothing. Am I still missed any packages that have to installed?

Running into the same issue so very interest in a solution. The icons show correctly in the Q app manager, but not in the top panel.

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Is there anyone has/had running into same issue? How you solve this?