P10 Plus turning the song's volume down for less than a second and turning it back after that

[RobNG]

Well, the title describes almost everything that is to know about... It occurs both on the standard music player of the phone and on "Black Player" too, so I'm presuming that it is not a specific error of some player. Could anyone help me?

 

[rece fice]

This happens when you get a notofication while you listening music. You don't hear the sound of your viber, whatsapp, messenger notification.. It's just turns down a volume for a second as a notification