Hi everybody, i'm new, and this is my first post on this forum.
I saw this post searching some solutions to the same problem i had about two days ago.
Not founding a good answer, taken by angry, i started to put in/out the jack several times...
Surprise! After about 30 times of rough plugging and unpluggin, the headset started to work properly with the jack fully inserted.
By this, i think that the brand new jack has some oxide or something else that can be removed by using it several times.
Not a "Tech support" solution, but in my case worked.
Let me know if someone else found my experience useful. 🙂
Bye