[NTG-context] Strangely placed dot

Hi, what is going on with the placement of the dot in this example, and how can I avoid it? \starttext \startTEXpage[offset=3bp] $E_tE_s=E_{\min(t,s)}$. \switchtobodyfont[stixtwo]$E_tE_s=E_{\min(t,s)}$. \switchtobodyfont[lucidaot]$E_tE_s=E_{\min(t,s)}$. \stopTEXpage \stoptext Output attached. /Mikael