Forgive me if this has been covered. I went back a few months and didn't see anything.
I am streaming Amazon Prime Video from my TCL 65R617 (Roku) via HDMI ARC (6 ft certified premium) between my TV and receiver (Onkyo TXNR575). On a few separate occasions now, a couple times with Gymkhana Files and most recently with one episode of Marvelous Mrs. Maisel, the audio has come through defected with some sort of weird digitized popping sound (like a robotic android whose voice modulator is broken).
To note, one episode of Gymkhana Files was particularly bad. The instance it happened on Maisel, more recently, was less obvious but still noticeable.
Also noting, this cord setup also serves every other thing I stream on the TV including Netflix and OTA DirecTV, and Amazon is the only time this happens. This obviously leads me to believe it is an issue with the source stream, but it's just weird that it isn't consistent for all things I stream on Amazon. Or maybe it isn't weird. I don't know.
Curious if anyone else has experienced this. If it happens again, I may try to call their customer service, but for an issue like this I am highly doubtful anything useful could be accomplished.