So it seems that my streaming stick was updated on 02/28 and since then, I have noticed that I keep losing audio intermittently.
My set-up is very simple
Roku Streaming Stick connected to Yahama RX-V385 A/V Receiver, which is connected to my LG TV using HDMI ARC. There are no other devices connected, I have a small PC but it stays powered-down almost all the time.
The issue is, as I am watching content, there's no audio for a small amount of time ( say less than 1/2 second) and this causes my Yahama to switch the input to either AV1 or Audio1 or TV:Broadcast, and it can take upto 2 minutes, before the audio is switched back to HDMI-1
Since the receiver isn't connected to the internet, and cannot get updates, I have reset the same, and experience the same issue.
W/R/T my television, it's a signage TV, so there truly isn't auto-update or even WI-FI connectivity. I did reset it too just in case.
To be more specific, I removed the batteries from remotes of all 3 devices,after playing some content on Netflix and Amazon Prime Video and experience the same issue.