I have recently bought an Anker Soundbuds Slim Bluetooth IPX5 headphone for the second time, and for the second time it happened that the left speaker's output drops dramatically after a few weeks of use. Before returning it for refund, I thought I might ask here for advice, if there is anything I could fix about it. I have tried it with several devices, and the volume drop on the left side remains the same. But is this necessarily a physical issue or can some setting within the device be the cause that can be fixed through some sort of factory reset?
EDIT: When I connect the headphones to my Linux laptop I see that they are recognized as a mono output, where it definitely should be stereo, so this seems to be something on the software side of things. However, still something in the headphones, because the same remains the case when I connect it to other devices, also, the sound which comes out of the headphone sounds very compressed, like on a good old phone, not at all hifi, as if the headphone advertises itsef in the wrong way.