Time of maximal emission $\tau_{\rm K}$ for charged kaons in Pb--Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV compared with the iHKM calculations and the result of the K$^\pm$K$^\pm$ analysis in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV. Statistical uncertainties are shown as bars and systematic uncertainties are depicted as boxes.