Lightning headphones- not working?

I bought an iPhone 8 on August 3rd from my cellular carrier. They came with lightning headphones, and I decided to try them. They worked fine, but only for less than a minute. They cut out, and plugging them back in doesn't fix it either. I've cleaned my charging port, restarted my phone, tried them on 2 other iPhones, and nothing has fixed it. The music comes out of the built in iPhone speaker.

I think this is important, but I'm unsure. When they plug in, a high pitch ringing starts. The sound doesn't come through the speakers in the headphones, but through the lightning port itself.

Anyone have any ideas or solutions?