Demo Not Working on iOS Devices

I have tried your demo on my iPhone X and iPad Air 2, both running iOS 13.1.2. The player is not working. It does everything it’s supposed to (visually) up to the point where the playback should start, but playback never starts (and no progress on wave progress bar). I can manually jump forward on the wave progress bar by pressing it, but no sound/playback. I have tried in Safari on both devices as well as Chrome on my iPhone. Is this a known issue?

Demoed from: https://sonaar.io/free-mp3-music-player-plugin-for-wordpress/?utm_source=Sonaar+Music+Free+Plugin&utm_medium=plugin