[NTG-context] Can't change typeface without type size

This seems to be a small bug. This works well: %%%% \usetypescript[pagella] \usetypescript[chorus] \setupbodyfont[pagella,22pt] \starttext Text on body font. { \switchtobodyfont[chorus,21pt] Text on special typeface. } \stoptext %%%% However, if I either remove '21pt' from \switchtobodyfont or just change it to '22pt' (i.e., no change from body font size) I don't get text for the other font. (This is not specific to pagella and chorus, I've checked this same problem with all other combinations I tried. I'm using latest version in minimals, i.e., did 'sh first-setup.hs' just half an hour ago.) Best, Maurício