There is a regression wrt sample file aveverum.rg, now in the repository. The same file was included in a bug report:
[ 1627424 ] Lyrics badly exported to lilypond
The bug was fixed, and the report closed, but now i've tested the exported result and it is broken. The problem doesn't seem to be the lyrics, but the barchecks and wrong calculated rests padding at the beginning of the vocal parts.