I’ve certainly not seen this on my iOS based S2 system. Still working like a champ, 100% of the time, but it has been a month or two since I’ve added new speakers. 

Have you submitted a system diagnostic within 10 minutes of experiencing this problem, and called Sonos Support to discuss it? My suspicion is a local issue, liable to be network related, since my system is working fine. 

Don’t post the resulting diagnostic number here, Sonos gets sensitive about GDPR.

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

Bruce, thanks for the reply and info. I have not done this but will follow your guidance. Very much appreciated!!

There’s been some debate about it recently, but many of my issues, many years ago, went away when I assigned reserved IPs for all of my Sonos in my router’s software/firmware system. It’s good network housekeeping, and certainly wouldn’t hurt anything.

I’m currently hampered by a router that doesn’t have that feature (and considering using something that allows greater control], so YMMV. I currently lose power frequently enough (poor power on my island) that it doesn’t seem to be an issue, but I’m a belt and suspender kind of guy, and am not wild about the stuff T-Mobile wants to keep me away from. It may be fine for the masses, but I think I’m slightly more educated in networking than probably 59% of their ‘users’. 

But contacting Sonos Support, not their chat system, would be must first step, since they have access to data that I don’t. 

​@Airgetlam …you should be the poster boy for Sonos….you neverrrrrrrrr have an issue. 

I definitely have had problems since mid July. I pick up 3 era 100s refurbished from the Sonos store and ever since I've been having problems. That suddenly affect my other speakers I've had for years. My kitchen era 300 currently keeps disappearing from the Sonos app or it will be there and say it's disconnects. Factory resetting doesn't help. It can't reconnect to be added. 

As has been said many times on these forums, a factory reset rarely helps, and it does delete any diagnostic information that might have been helpful in identifying issues. Next time it happens, why not generate a diagnostic report within a few minutes of it happening, submit it to Sonos and connect support? 

More like "has issues, finds solutions and has no more issues."

I've had a number of issues, most self inflicted but a few weren't directly my fault. The whole new-app mess and far too slow recovery as a prime example. As to my fault the one that really sticks in my head was a router change or possibly adding more Sonos (too much effort to prove which)  that pretty much ruined my setup, missing, won't play, dropping out were driving me batty. A simple five minute forum suggested fix ended the mess. With reserved/static IP addresses the issues are gone. Always worth a try and hurts nothing.

I’m seeing an issue in the last few days where if I pause something playing from my library and go back a few minutes later it says there’s an error playing <track> where that song is the first one on the album but it loses the place of the current song playing. Also recently played is still giving an error if you try to navigate to that album from it. 

Do you have power management ent enabled on your library server?