In SATB short score, shared lyric text prints once and aligns across all voice parts singing the same words

When multiple voice parts on the same staff sing identical text at the same rhythmic position, the lyric line is shared/centered relative to the combined noteheads at that beat, not repeated once per voice.

A 4-voice chorale (Gradus explicitly teaches Bach chorale harmony) authored with notes plus voice2/voice3/voice4 has lyric text attached separately to each voice's note array with no reconciliation, so if voices' onset times differ even slightly, the four 'shared' lyric rows drift out of alignment relative to each other.

Gould (vocal scores with several voices); Ross on chorale short-score conventions.

This rule needs the notated content and the rendered result together — the score says what should happen, the page says whether it did.