Caesura and Breathmarks delay the Playback

Describtion of the issue:
After adding any type of break the playback has problems with it. The indication bar that shows wehre in the music it is playing gets out of sync.

Steps to produce the issue:
1. Add a caesure (//) anywhere in the music. Or add a breathmark and set unter playback the duration to more than 0.
2. Play the music.