Comment 5 for bug 1925265

When creating the Ubuntu Budgie Pi image, we ran into this same issue. The packages are removed through /usr/sbin/oem-config-remove-gtk but leave behind these same packages. If we mount and chroot into the image, and modify oem-config-remove-gtk and change:

    def _on_transaction(trans):
        apt_dialog = AptProgressDialog(trans)
        ...

to:

    def _on_transaction(trans):
        trans.set_remove_obsoleted_depends(remove_obsoleted_depends=True)
        apt_dialog = AptProgressDialog(trans)

this seems to "fix" the issue. After setup, there are no packages to autoremove. I have tested this not only on our Budgie Kinetic Pi image, but also on the Ubuntu Kinetic RasPi Preinstalled Desktop image.