Changing 8va or similar to 15va in inspector panel changes appearance but not playback pitch
1): Place any note and add the 8va to the note.
2): Highlight 8va and go into the inspector panel, and under "Ottava", change the type to for example 15ma.
When listening the playback still plays the note as if it were 8va
Just a minor bug as placing a 15ma alta directly works just fine