Prior to this upgrade, I highly recommended Roku over Firestick. I tend to be sought in our area as being a "resident expert". Obviously, a title of undeserved hyperbole, but I talk to very many people. I spoke as an "expert" in our community club in early December. At that time, I was recommending Roku.
Now, given this problem and what seems to be a lacking response to a fix from Roku, I have rescinded my Roku recommendation and now recommend Firestick.
I just still say that my "fix" earlier in this thread, setting VOLUME MODE to OFF, has addressed my issue on a Roku Ultra. I no longer have the problem.
Model: Roku Ultra 4670X Software Version 9.2.0 Build 4806 Display Type forced to 1080p HDCP1.4 TV: Samsung 46" Series 7
I have the same issue, in addition I'm suspicious that my Roku Ultra is rebooting.
Prior to having this Roku Ultra, we had a Roku 3 plugged in, using the same 12" high quality HDMI on the same input on the TV. We wanted to add Roku to another TV, so we upgraded our main TV and moved the Roku 3 to a new location.
For us, the menu clicks are usually OK, as you navigate through menu or channels, sometimes distorted, but usually not. The "Di-Dink" which is the sound that you hear when in ressing the home button is garbled every time.
I have the problem with audio going south on YouTube (which we run a lot), Prime, or Hulu but then any channel we try does the same thing. Only fix that works (3-4 days usually) is restart the Roku. FYI the TV brand etc has nothing to do with this as our Roku 3 doesn't do this and the TV has not been changed.
Running an Ultra with the latest software release. Problem appeared when 9.0.0 was installed. Updates since have not resolved the problem. Been running an Ultra for months before release 9.0.0 and never had this happen. Running Frontier 30 mb FIOS and generally have nothing else on the network active with the occasionally tablet active.
I'm glad I stumbled across this post. I've been fighting this for some time now and have tried about everything even replacing my HDMI cable. It's to the point that we just reboot the Roku before we even start watching TV now because the cutouts make shows unwatchable. I purchased an AppleTV a couple of weeks ago that worked perfectly and if not for that sliver of a remote and the fact that I just don't do Apple, I would not have returned it.
I gave up and returned the Roku Ultra I got on Amazon for 1/2 off on Black Friday. Too many little issues that were driving me nuts. Got the new AppleTV and it's absolutely superior in so many ways, especially if you already own an iPhone. Sorry Roku, I tried. Still like my TCL Roku TV, though. It's been pretty solid.