Having been a choral singer for over 40 years, I’d say that barlines through vocal staves are always annoying and unwelcome, and impart no useful information or context.
It’s very easy to display two or more choirs clearly and distinctly without resorting to that.
However, don’t take my word for it:
Elaine Gould, Behind Bars, p. 463: “Each vocal staff always has separate barlines, to avoid intersecting the text.”
Schirmer Style Guide, p. 21: “The common exception to this rule is vocal and choral music … this is done to keep the barline from interfering with the text.”
Ted Ross, The Art of Music Engraving, p. 152 “vocal ensemble and hymn … use separate barlines for each staff.”
Gardner Read, Music Notation, p. 295: “In order not to interfere with the written text of vocal music, barlines do not usually extend through all the voices as a group. … the text may be more easily read.”
There’s always going to be a balance in music software between the flexibility of letting you do anything and the utility of assumptions about accepted conventions.