Slide timeline objects are not synced when played in preview

[Storyline Issue]

Hi,

I'm using a full screen video on 1 slide, with automated pauses at specific locations where dense information is displayed in the video. These automated pauses are using triggers based on non-visible objects appearing at the right timing to pause the video. This technique works great.

However, when I'm previewing the slide, the automated pauses are happening, but not at the desired timings.

For example: I've set the first start to be happening at 32 seconds after initial slide start. The video is starting at the beginning of the slide as well. But the video is paused at 30 seconds. 

Would this be related to the fact that the slide timeline starts before the video (mp4) is loaded and played?

Thanks for your feedback.