SUB gets out of sync after update to 14.6 - bass is delayed making it sound like reverb

I’m not seeing how resetting the WiFi would help here, as the Sub uses a direct 5Ghz wireless connection between itself and the ‘bonded’ main player - although you might perhaps have wireless interference issues around your actual devices, perhaps? .. IMHO, I think trying to explore 5Ghz interference and maybe try to look closer at that issue, might possibly be a more effective longer-term solution.

Just thought I’d add my experience to this thread as I have the same issue on 14.8

I spent time chatting to Sonos support and in the end hardwired my Arc to my router (fortunately for me they are close to each other) and this has resolved the issue, so it definitely appears network related, but more likely Sonos rather than Wi-Fi as it was working before latest updates.

So for now, hardwire if you can until it gets fixed.

I have been expecting the same problem. Tried everything keeps coming back. This needs fixing Sonos!!!

so unhappy with my $2k system...arc, 2 oneSL surrounds and sub.  The surrounds and sub get out of sync with the arc creating a nausiating echo effect.  have the same setup at another house except for a beam and it sounds great.  Seriously Sonos, fix this issue, you're loosing major credibility.

Are you sure you have the surrounds configured as surrounds?  Correctly configured, the surrounds should not be playing the same signal as the fronts, so an echo would be impossible.  The only way for them to play the same signal is if you had them grouped, and a grouped speaker playing a TV source will indeed have an echo. 

appreciate the reply…yep, they are set up as surrounds.  there are 2 options to control them, tv or music.  doesn’t matter if i stream pandora from the tv app or my phone, same echo effect.  this wasn’t an issue until a month or two ago, so that points to a fw upgrade from sonos.  as i said, same setup at a different house except using a beam and no issues.  others seem to be having the same issue.

I actually bought an S1 only unit just so ours always fails the "Upgrade to S2" test, £50 well spent on a ZP90!.

Time and time again forced updates ruin what is a good system.

Issue just occurred again!  This time I removed and re-added the sub to fix the issue!  Come on Sonos,  this is crazy, get it fixed.

Same issue here. I have to remove the sub from my setup and add it to correct the problem, but it gets out of sync again a few days later. Hope this gets fixed soon as it is rather frustrating to have paid this much money for a system that doesn’t work properly. 

What response did you get when you submitted a system diagnostic within 10 minutes of experiencing this problem, and called Sonos Support to discuss it?