Noteheads of adjacent semibreve incorrectly positioned in part

1. Open attached score.
2. 'Parts…'.
3. 'New'.
4. Tick instrument.
5. 'OK'.
6. View part.

Result: The adjacent notehead is positioned too far from the rest of the chord.

Full:

Part:

Using MuseScore 2.0 Nightly Build (3e51505) - Mac 10.7.5.