ID 375731 - [C] Audio: The first playback from a panel other than the first causes audio to briefly play from the beginning

Problem summary

When first playing a Sequence containing audio from a panel other than the first, the audio will briefly play from the beginning, and then fix itself to follow the corresponding panels.

Steps to reproduce
1) Create a Sequence Revision with 6 different panels. 
2) Record a pitch for it; a good idea would be to count the panels out loud as you are skipping through them.
3) Save the Sequence Revision.
4) Select the third panel, and play the Sequence. The audio from the first panel will briefly play, then it will start matching the panels.

Expected behaviour
The audio should play from the correct point in the Revision. 

Actual behaviour
The audio will briefly play from the start, then it will start matching the panels.
Repeated attempts on the same Revision will show the audio playing back correctly, as this only occurs on the first playback.

Reproduced by support

6.3.4 - macOS 10.14

6.3.3 - macOS 10.14