Grace note beams get stuck in continuous view (horizontal)

[avvvvve]

Issue type

Engraving bug

Bug description

In continuous view (horizontal), doing anything that changes the width of a measure (i.e. adding a grace note or accidental to the first note) causes beams of grace notes after that measure to become misaligned to their stems. Switching to another view—page view or continuous view (vertical)—and switching back fixes the display, and it only seems to happen in horizontal continuous.

Steps to reproduce

1. Set view to "Continuous view (horizontal)"
2. Add some grace notes after the first measure of the score
3. Add a grace note to the first note in the score (or do anything that changes the width of the measure)

Screenshots/Screen recordings

gracenote_beams.mov

MuseScore Version

MuseScore version (64-bit): 4.0.2-230651546, revision: github-musescore-musescore-dbe7c6d

Regression

No

Operating system

macOS 12.6.1

Additional context

No response

[oktophonie]

And in 3.6 too!:

(and still in master)

It's an "I'll fix myself as soon as anything triggers a redraw" MuseScore classic, of course. sigh