I found two bugs during playback: one has no sound, and the other shows an abnormal playback cursor.

[goodgame365]

First bug: When the first note of the sheet music is a grace note, I noticed that during playback, there is no sound on the first beat, and sound only occurs on the second beat.

Second bug: The playback cursor is abnormal.

There are two conditions:

When the entire piece has two eighth notes changed to one eighth note with a dot and one sixteenth note.
When there is a dotted note within the measure.
If both of these conditions are met, the cursor behaves abnormally during playback, jumping back and forth and flashing.

Below are the related videos and test sheet music.:

20250728_182739.mp4

score file:

test.zip

[Danielku15]

Please report bugs properly via the bug report template.