I have a joule electra marianne edition preamp and it does not invert channels. It does invert phase which requires reversing speaker cable polarity. But l-r channel orientation has always been correct and consistent for various inputs and the problem has only manifested since installing the 006/gaia combination.
Running the correct pin settings indeed inverts channels compared to before putting the 006/gaia into the mix, and compared to my vinyl rig. I have corrected the inversion by reversing the setting on the LRCK wires; I’m concerned that is introducing timing errors. I could revert to "correct" pin settings and reverse l/r interconnects between the DAC and the pre but I’m trying to get to the bottom of the issue.
I will keep fiddling and burning everything in a I will keep puzzling over the inversion. It’s quite strange and unexpected.