I saw many complaints going back several years on two websites including the apple support community. This is not a new issue. I used four wireless earbuds that all failed under warranty and then failed again after the warranties ran out. I treated them gently. I started using the wired Apple EarPods after that. My EarPods are out of warranty. I am not going to pay $29.00 or the reduced price of $18.00 for earbuds that go bad after only a few months of use. I used the wired EarPods one to three hours a day most days. I always removed them from my iPhone and ears after use, and stored them in an unfolded position on my bedroom dresser, ready for next day's use. I always treated them gently.
It is my understanding the problem is caused by separation of wires on the wired EarPods near the connection to the iPhone.
This is a defect that Apple has ignored.
Therefore, I will only spend only $5.00 on non-Apple wired EarPods, until I find a good one.