Slurs from notehead in chord

In guitar (and other harmonic string instruments) notation, there is common situation, when slur is made only at one string in the chord. But chord is usually written in one voice. In actual version of Musescore, when slur is added, there is necessary to manual adjustment of the end of the slur. Why is not posible to make slur automatically from concrete notehead in the chord? Example in attachment.
Thanks you
Vladimir