[BUG] Playback head does not progress for audio only item on iOS (iPhone) #582

Describe the bug
On iOS iPhone, when an audio only item is played, the playback head does not progress.

To Reproduce
Steps to reproduce the behavior, including the results:

1. On an iPhone (iOS 17), go to https://avalon-staging.dlib.indiana.edu/media_objects/rf55z7692. This has been confirmed in Safari, but also reported in other browsers.
2. Click play to start playback.
3. The playback head remains stuck at the beginning, even though the audio is playing.

Expected behavior
Playback head should progress as the audio item plays.

Screenshots/Screen Recording

Environment (please complete the following information):

• Device / platform: iPhone
• OS: iOS 17
• Browser: Safari (and Chrome?)
• avalon-dev
• [x ] avalon-staging
• mco-staging
• mco-production
• demo