Ottavas are not correctly imported
Create a score in version 2.x and insert some ottavas (e.g. 8vb, 15ma, etc.).
Import the score into version 3.
All of the ottavas will display as 8va ottavas. Playback of the ottavas is not affected.
The workaround is to either delete and re-insert the ottavas or change the type of the ottava in the inspector.