I was having problems with an audio 'skip' if the chord sheet had chords that went below the screen. As the song moved down and the screen refreshed the bottom part, there was an audio skip. The same skipping was more annoying on the Notation window since it happened at each refresh - every four bars.

Increasing the latency from 104 (the setting that was 'default') to 499ms cured this problem completely. So, thanks for this tip.