Hello. I have a strange problem. I used the buffalo 3 dac for a car audio project, and I sucessfully tapped the i2s lines from a navigation headunit.

The combo works, and sounds great. I have one strange problem.

For some reason, the left and right channels switch back and forth. It was hard to notice at first, but I cut the right channel on the head unit to test, and surely enough, my channels are swithing back and forth.

somestimes it happens after about 2 min or so, sometimes it doesn't happen for an hour.
What can it be? A problem with the LRCLK? There is no problem with locking.

Any input is greatly appriciated. Thank you.