The chord diagram returns to default after reopening the file

The chord diagram returns to default after reopening the file
1. Enter the chord name (Db).
2. Add the chord diagram (add the D chord diagram).
3. Edit in the inspector (edit to 4th fretboard position).
4. Save file.
5. Open
=> The chord diagram return to default (the 4th fretboard position return to 1st position).