Playback head wipes score melisma line

1. Open attached score.
2. 'Play'.

Result: The melisma has some missing chunks.

Discussion: It maybe a different issue, but it might not be limited to the playback head. When I clicked on the note in the original full score, the melisma became longer.

Using MuseScore 2.0 Nightly Build (5be9488) - Mac 10.7.5.