On leptonic width of X(4260)

New measurements on cross sections in $e^+e^-\to J/\psi\pi^+\pi^-$, $h_c\pi^+\pi^-$, $D^0D^{*-}\pi^++c.c.$, $\psi(2S)\pi^+\pi^-$, $\omega\chi_{c0}$ and $J/\psi\eta$ channels have been carried out by BESIII, Belle BABAR collaborations, also the $D_s^*\bar D_s^*$ channel. We perform extensive numerical analyses combining all these data available, together with those $D\bar D^*$ $D^*\bar channels. Though latter show no evident peak around $\sqrt{s}=4.230$ GeV, missing $X(4260)$ is explained as that it concealed interference effects of well established charmonia $\psi(4040)$, $\psi(4160)$ $\psi(4415)$. Our reveal leptonic decay width ranges from $O(10^2)$ eV to $O(1)$ keV, hence may be conventional quark model picture. That is, interpreted a mixture $4^3S_1$ $3^3D_1$ states.