Were you able to try some of the suggestions here in the thread? I know it's an older thread, but they could still certainly help you out.
Same issue exactly, solved in weird way.
My headphones are great and work fine with other devices including my old iPhone. Seems to be a very slight jack incompatobility.
I have an old headphone splitter jack which I bought at radio shack many years ago. Basically you plug this thing into the headphone jack, and on the back of it there are two holes so you can plug two pairs of headphones.
I tried it, and it works fine now.
Or, you may want to consider getting a headphones extension cable.
This problem happened to my S7. It was under warranty, so I returned it and got a replacement. The same exact thing happened several months later, but my S7 was out of warranty by then. I did notice that if I was playing music and slowly pulled out the headphone jack, the right channel came on for an instant.
I found the following on another site, which seems to be a logical solution based on the symptoms. I tried it, but since I couldn't see inside the jack even with a bright light, it was difficult to know if I was at the right spot. I couldn't get it working yet, but will try again.
Hello folks i had the same problem suddenly just b4 yesterday and I tried everything to fix it with no luck so i decided it was a hardware issue . I took a sewing needle and started playing with the clips inside the headphone jack with no luck either for 2 days and today I found an xray image of the s7 edge and got an idea since the right channel doesnt work the problem must be either the right ear clip or the right ear ground ( the second and third clips of the jack ) i took the needle and with only one magic gentle bend outwardly to the second clip from the left side as phone faces you everything came back to work i will attach the image and hope this helps you