The Kerker effect, i.e. the total suppression of back scattering, is a consequence of the rotational and duality symmetry of the system. The effect of the breaking of each of the symmetries on the backscattering on the system is numerically investigated.
M. I. Abdelrahman, et al. Effects of symmetry-breaking on electromagnetic backscattering. Sci. Rep., 11, 1721 (2021).