Questioning MAMI's recent determination of $B_{\mathrm{\Lambda }}({}_{\mathrm{\Lambda }}^3\mathrm{H})$

A recent report on ${}^7\mathrm{L}\mathrm{i}(e,e^{\mathrm{\prime }}{K}^{+})$ electroproduction runs by the A1 collaboration at the Mainz Microtron (MAMI) assigns a sharp pion-momentum line at $p_{{\pi }^{-}}\approx 113.8\pm 0.1$ MeV/c to ${}_{\mathrm{\Lambda }}^3\mathrm{H}\to {\pi }^{-}+{}^3\mathrm{H}\mathrm{e}$ weak decay, resulting in exceptionally large ${}_{\mathrm{\Lambda }}^3\mathrm{H}$ binding-energy $B_{\mathrm{\Lambda }}({}_{\mathrm{\Lambda }}^3\mathrm{H})=0.523\pm 0.013\pm 0.075$ MeV. Here I suggest an alternative interpretation of the observed sharp line in terms of ${}_{\mathrm{\Lambda }}^7{\mathrm{H}\mathrm{e}}_{\mathrm{g}\mathrm{.}\mathrm{s}\mathrm{.}}\to {\pi }^{-}+{}^7\mathrm{L}\mathrm{i}(E_{\mathrm{x}}=478$ keV) weak decay, discussing also the model dependence of $B_{\mathrm{\Lambda }}({}_{\mathrm{\Lambda }}^7\mathrm{H}\mathrm{e})$.