After no success with a Snap B260 extender on one job, I put in an AVProExpress HDMI extender with ARC and have gotten 3+ trouble free weeks out of it. No more sound flipping from TV to Sonos AMP.
it’s a lot pricier than the Snap piece, but since it works…
There is no truth anymore. Only assertions. The internet world has no interest in truth, only vindication for preconceived assumptions.