I have had very slow response and also missing speakers on the Sonos app on my Iphone. I found a lot of info here on this forum that helped but never fully solved it. Below is a list of things I tried before I was able to solve my issue.
- Get rid of services that are not used. In my case I had several services and one in particular called TuneIn that once deleted showed improvement. (Thanks to the member that suggested this).
- Limit your outside playlist to under 500 songs. In my case I had Amazon playlists in excess of 1000 tracks. I split my playlists and made them about 350 tracks so if I want I can add tracks later.
- I put all my Sonos equipment in a separate SSID with a static IP. Make sure that ONLY Sonos equipment are part of this group. My issue improved greatly by doing this. I noticed if my Iphone was in the Sonos SSID the lag was there. Once I removed my Iphone from the Sonos SSID the lag improved greatly. No more missing speakers!
My system has ARC, Subwoofer, and 2 ERA 300’s for surrounds. I also have 2 ERA 300’s and a minisub in another room as well as 2 ports and 2 Play 5 Gen2. I also have a Move and a Roam.