I already provided this information on page 1 of this thread. But here it is again (below). PLEASE do notice this is a widely reported issue, not some edge case, Reddit threads are full of people complaining, several posts on these forums. Many more unreported because people arent tech savy enough to associate their Roku "breaking" with an update (they probably dont even know it gets updates). And this is terrible news for Roku, as these people will just say "Im not buying another Roku, last one broke soon after I got it". Please just push back 9.4 version (or allows us to roll back), take your time to figure out this issue, then push 10 out when its resolved. This isnt some 'inconvenience' this is literally ruining family movie nights as 5.1 DD is no longer possible.
Alternatively, push 10.1 with an option to Force DD 5.1, and disable auto detection. Roku would just spit out 5.1 regardless whats on the other end of HDMI. That would be an acceptable fix for now. Id even be willing to take a beta build if it has a workaround of some sort.
-Roku device model: Roku 4
-serial number: YY0020011508
-device ID: 4U7592011508
-software OS/version: 10.0
-does this issue occur on a specific channel? Any channel that outputs 5.1 Dolby Digital (DTS and Stereo work fine).
-tracker ID when this issue occurs (when you see this issue occur, press the Home button 5 times, followed by the Back button 5 times): 08-170-339
-steps to reproduce the issue you are seeing: Just trying to watch anything with Dolby Digital 5.1 Audio
-what is your audio set to (let us know what is shown in Settings > Audio > HDMI): Dolby Digital/DTS, like I said DTS works fine, DD does not. This setup has worked flawlessly for many years. 10.0 is what broke it. if I set it to "Auto" it just plays everything in stereo.