Note 5 AUX malfunction?

Note 5 music player works perfectly, but when connected with AUX cable (to speakers, in the car, everywhere), after a song or two the music fades out and it refuses to play with AUX cable, while it plays on its own and on earphones. Different AUX cables have been applied and different music apps have been tested, but same thing. This is so annoying and frustrating. Any solutions?