Intrinsic time delays extended to low-energy domains for the case of the intrinsic increasing trend from Fig. 2, obtained for low redshift (z = 0.03, black) and high redshift (z = 1, orange). Here the energy reference value is taken at E_ref = 1 MeV. At high redshift, fluxes at the highest energies are reduced and the corresponding data points are suppressed due to strong EBL absorption. The regime found at low redshift is retained nonetheless. No LIV delay is injected here.