||Brant Langer Gurganus|
Across these browsers minimally, the audio is double playing. It appears to be playing with the visible video and playing from a second source. Stopping the video does not stop the second source. Edge 44.19536.1000.0 (this is being discontinued this month, replaced by the Chrome-based Edge). Chrome-based Edge Beta 79.0.309.56, Dev 80.0.361.9, Canary 81.0.380.0. This also happen in the release channel for Google's Chrome 79.0.3945.88. It seems okay in Internet Explorer 11.1000.19536.0. Given that it is happening in Google's Chrome, I wouldn't attribute it to an issue in the Chrome-based Edge builds.
I didn't get notification you left feedback so sorry for the delay. Issue was on either Digital Zen and/or Become a Superlearner. As of Edge canary Version 82.0.459.1 I'm guessing this was a Chrome issue that got addressed. I cannot currently recreate it.