SCORM package on iPad Safari no audio

Hi, 

My client and I are having the issue with audio playing on iPad pro with version 13.3. When we run the testing, the audio indicator indicates play but does not produce sound. If sound paused then restarted, the audio plays at the beginning though audio indication indicates that it's further along than it is. Failure occurred after IOS update to 13.2 (was no issue with 12). I've tried SCORM 1.2 and 2004 with all 3 editions but all returned the same results. Would very appreciate if any of you have any suggestions or thoughts on it. Thank you in advance.

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