garbled X1 TV audio

Like others, I'm experiencing intermittent garbled audio on one of my TV boxes (the other works fine). So frustrating that a fix has not been discussed. I've swapped out the TV boxes, sound bars & HDMI cables many times but the issue continues. I just recently discovered the existence of wireless Xfinity TV boxes.  If I were to connect the TV via the Xi6 wireless box (to eliminate the potential coax variable that could theoretically be causing the issue) would I still be able to record shows?  Has anyone tried this?