Not really an issue...

[Jojo-Schmitz]

Just wanted to let you know that a) I linked to this tutorial from https://musescore.org/en/node/344310 and b) there's a nice method to get this to work also with a Closed Score SATB, by using the S/A and T/B texts (from the advanced Workspace's Text palette) and then using the Mixer, 'unfold' the Women and Men 'instruments' to see separeate settings (Mute, Solo, Volume) for Soprano (voice 1 and 3), Alto (voice 2 and 4), Tenor (voice 1 and 3) and Bass (voice 2 and 4).

BTW: @MajaReissner : We talked at FOSDEM ;-)