All, This came up on the FB group and I determined that the problem is the presence of the \acciaccatura. In the following passage, the LyricExtender somehow misses the signal to end before the grace note appears, forming a continuous line from "bad" to "ex" instead of stopping near the "c2.". Is there any workaround that can fix this while keeping the grace note?
\version "2.25" \new Voice \relative c' { \time 3/4 g'4 a8 b c4 ~ | c2. | \acciaccatura g8 d'4 e4 c4 | } \addlyrics { This is a bad __ ex -- ten -- der. } Best, Abraham