MediaElement Player Buffering not working

We have implemented mediaelement video and audio player to our site bbsradio.com. It is based on Drupal 10. We used a contributed module to display the video (mp4) and audio player (mp3). jQuery is used for implementation. It was working fine, but suddenly the progress bar is not working.

For mp4 / video file, if I drag the progress bar manually, the video stop and reset to beginning. For mp3 / audio file, I can't drag the progress bar and also its not showing the total time of the audio. Sometimes I saw Nan:Nan when hover over the progress bar.

We are using version 4 still. But I checked with version 7. Still have the same issue.

Here are two pages for example, to check the issue. https://bbsradio.com/podcast/getting-know-your-bible-september-19-2024 https://bbsradio.com/podcast/signs-life-mediums-and-messages-september-19-2024

I don't see any error anywhere. So do not understand what may cause the issue. I checked all the documentations as well. Can you give any hints, so that I can fix the issue?