Lost surround and sub ( after update ?)

Lost my subs again. This time it was shortly after enabling “Input Signal Plus” for HDMI 3 (ARC) port on my Samsung S95B TV. It’s crazy how we have so many diagnostics recorded with this bug active and the communication has been lackluster since Corry retracted his initial statement.

Most recent diagnostic: 114012412

Reproduced the bug again, this time it was triggered by toggling Dolby Atmos several times through my Samsung TV (Sound > Expert Settings > Dolby Atmos)

Diagnostic: 457472945

Interesting note about this bug: when it occurs, if you disable your subs through the Sonos app, the bass signal is processed by the Arc as if you have no subwoofer. When you enable the sub again, the bass signal is lost again without any bass being reproduced by the Arc. 
 

It seems that this bug ends up blocking the bass signal from reaching the subs and essentially discards it. But it is restored to the Arc if subs are disabled in the app while the bug is active.

@Corry P you might find this information useful.

Yes, I have observed that issue as well, although not as much as the loss of rear and sub sound.

Really feels like the ARC is struggling to process the sound and communicate it out in a timely fashion. I certainly cannot see any network congestion on my side. During this issue I have moved all the networking devices together, created a segregated network so I have a more ‘ring-fenced’ network. It has made no difference, but at least it has helped on a journey of elimination.

I rebooted everything last night and watched a Disney+ film for 45 minutes (Dolby Atmos) and the sound was consistent. I then moved to Netflix and played a 5.1 movie and the rears and sub went dead from the get go. (Although I did notice that some bass was being sent to one sub, but it was flabby, unrefined and horrid).

Worth reiterating, I have also had occasions that when the sound is not working for rears/sub, and I keep playing the movie, the rears have started to crackle and stutter and then come back to life. Again this is rarer than the other symptoms, but it might be helpful in understanding remediation. 

Last night after having the issue and fixing it I decided to power recycle the arc, this caused the issue to return 

I removed and readded the sub and the surrounds returned as well without doing anything else 

This morning all still working so I will just readd the sub as a temporary fix when it happens again 

Hopefully they will do an update soon to fix the problem 

@skullc - is it still working throughout today since you removed and re-added the subs + surrounds? 

Yes so far so good 

The latest fix I did was remove and readd the sub the surrounds reappeared without doing anything 

The first time I got the fault was rebooting the apple tv not switching sources I haven't had the issue doing that 

Same issue, since 14.6 my sub disconnects and rear speakers too!! Before 14.6 everything work flawlessly. This is an issue with your update!!! Please fix.

@Brad Porter on a side note my bedroom beam and surrounds have not had the issue 

Also I have 2x fives with a sub that seem ok as well 

Unfortunately the issue will come back eventually