Applications menu symbolic icons not recoloring

When setting the icon to a symbolic one, it doesn't recolor to the theme's colors. When searching icons, the symbolic names are actually hidden, so you have to use xfconf to set it.

Steps to reproduce:

  1. Use adwaita-xfce icon theme
  2. Use xfconf to set button-icon=start-here-symbolic (easiest way to do with GUI: firstly change the icon in the plugin's setting to something different than the default, then you can use xfce4-settings-editor, select channel xfce4-panel and search for button-icon)
  3. Change gtk theme between Adwaita and Adwaita-dark. Notice the icon is always black, making it invisible with dark themes.

For comparison, you can also add whiskermenu to the panel and also set it's icon to start-here-symbolic. You will notice that there, the icon gets recolored, matching the text color.

Screenshot of gtk theme Adwaita-dark with Applications menu next to Whiskermenu. The icon of Applications menu is not visible. slika

Same poor visibility in the properties, icon does not recolor. slika

openSUSE Tumbleweed, xfce-panel 4.21.3