Hello, I am engaged in the maintenance of electronic products, according to your question; It's because the jack of your earphone has been used for too long or plugged in and out frequently. Another point is that your earphone plug may be oxidized. But you can try. Put your headphones on another audio source to see if the problem still exists. If there is, there is something wrong with the earphone. Generally speaking, repairing headphones is not cost-effective. If there is no such phenomenon, it only means that your audio jack is loose, because it takes too long or is often plugged in and out.
I hope I can help you, hehe, please give me TKS in different grades! ! !