Storyline audio stops working on random slides

I’ve been working with Storyline for some time, but this time I’ve encountered an issue where I’m unable to identify any clear cause or logic behind what’s happening.

I currently have four modules published from Storyline, both for SCORM and Review. During the review process, one of my colleagues commented that a particular slide did not have audio. However, when I checked, the audio was present on the slide timeline and played correctly on my end in both Review and Preview. Another co-worker of mine also confirmed that the audio worked for her. 🙃

I then published the module to SCORM and uploaded it to Moodle. While conducting final testing, I noticed that a few slides are experiencing the same issue. The audio does not play when the slide starts. To make the audio work, I either need to:

• go back to the previous slide and return to the slide, or
• let the slide timeline finish (in restricted mode), then drag the timeline back to the beginning, at which point the audio starts playing.

I would prefer not to create a trigger on every slide to play the audio, as the audio should automatically play when the slide timeline starts. Additionally, most of the slides are working correctly, and only a few slides are affected, which makes it difficult to determine the cause. 

if anyone has encountered similar issues and have some suggestions or tips on how to fix this. I would greatly appreciate the help!!!