Function update_source 

pub fn update_source<C: Component + Clone + PartialEq, F: QueryFilter>(
    commands: Commands<'_, '_>,
    changed: Query<'_, '_, (Entity, &Propagate<C>), (Or<(Changed<Propagate<C>>, Without<Inherited<C>>)>, Without<PropagateStop<C>>)>,
    removed: RemovedComponents<'_, '_, Propagate<C>>,
)

add/remove Inherited::<C> and C for entities with a direct Propagate::<C>