> LilyPond incorrectly compresses consecutive, proportionally spaced measures
> when the following conditions hold:
> 1. first measure in the sequence sets \proportionalNotationDuration; and
> 2. last measure in sequence is followed by \newSpacingSection; and
> 3. all measures in sequence carry \noBreak commands.
Hi, Trevor -Thanks for the message. This has been entered as Issue #5440.
All the best, Ralph