_mK_XEgDgpj8y8 I had the same issue for quite a while, but I accidentally figured out the solution today. I tried cleaning and it never worked, nor did a reset.
First, connect the earphones to your Macbook like usual. On your Macbook, go into sound settings by clicking on the 🎧 icon in the taskbar. Scroll to the bottom and adjust the balance so that the slider is exactly in the middle.
I don’t know how this has happened, and it has happened only with the Ear(2)s despite me using several other Bluetooth headphones, but this seems to have done the trick for me.
(I am attaching a couple of screenshots, hope it helps 😄 )