No sound on iOS in Captivate output?

Hello community,

We have an issue where I work; suddenly we are getting independent reports from customers that our Captivate projects are no longer playing sound on iPad. All other sounds work fine on said iPads.

We have a mix of audio files and video files in our projects, but none of the sounds are playing. One customer reported having a single audio file play (a "Well done!" voice-audio after correctly solving a task) but this is all we know. All customers have been instructed to try different browsers, including Firefox, Safari and Chrome, but to no avail.

There was a major update to iOS quite recently, and I suspect this might be related to the sound issue, but I am not sure as sound still plays on our own updated iPads. I can't reproduce the problem, so I am at my wit's end. We've tried multiple export options and nothing helps.

Is anybody experiencing the same? Or does anyone have a suggestion for a fix I could try?

Thanks in advance.

Michael