Strange noises and cracks after closing the media player when launching in iOS

The project has background music (Ambient Sound). When I play the video (Media Player) in the widget and use a Media Sound Component to play the video sound, the background music will be turned down; when I close the video, the background music will recover to its original volume. It works right on the computer.

However, when I launch it on iOS, after closing the video, the background music becomes unclear with noises and cracks.

Hope someone could help me. Thanks!

hi there…will you share the code to turn music down and turn back up when you resume play please