Sound issue due to another Streaming app

Hi everyone! We develop some fitness app and we met an issue with level of the sound in our videos. The flow is:

  1. the User is listening their music from streaming platform.
  2. Then he opens our app and decided to start a workout.
  3. While he is making their exercises they have an option to watch the video how to make it.

And that's where smth weird happend.

  1. When the User clicks on video to play and once it's playing the music from streaming app is a little reducing, not so loud as it was before.
  2. When the User is reducing the sound lever with their side button on in our video player volume slider, the music volume is also reducing.
  3. Ans sometimes the music volume is reducing and doesn't go back up until the User kills the our app and restart the workout.

So there's some conflict between our app and streaming app. Maybe someone now the solution how fix this issue and do not change the sound volume from streaming app while Users is watching videos? Thanks in advance, will be glad to receive your suggestions