You’re welcome! It’s a great blog

https://lilianweng.github.io this one?

This guy pans.

Makes sense. It’s probably the trrs cable issue you mentioned. Hope it works after that!

I’m not sure if this is true for the firmware you’re using, but at least for zmk, the left and right halves use left and right side specific firmware files. It sounds you installed the left side firmware on both.