Note themes usually set Inherits=gnome,hicolor
Adding Humanity in the /favoriteicontheme/index.theme as: Inherits=Humanity,gnome,hicolor
will solve the bug.
Note themes usually set gnome,hicolor
Inherits=
Adding Humanity in the /favoriteiconth eme/index. theme as: Humanity, gnome,hicolor
Inherits=
will solve the bug.