Android app constantly freezes / crashes with update 9.0.1 update.

Yeah, they're in a state of denial. I finally shut them up about my network being the issue (instead of the Android app) when I put my home PC on the WiFi and successfully controlled the system for hours without the app crashing. Sonos = effing stumped, LOL!
Your network IS the issue, the Sonos app is just a remote control - no more, no less.

Yeah, all of a sudden, after this update, lots of people's network is the problem (check their community page on Facebook). Explain to me then how my Win10 PC, using a WiFi dongle, has no issue whatsoever controlling my system. It's on the same network. No more, no less.

I forgot to mention that all of my controllers are hardwired.

To all those who do not have an issue with your system: Do you utilize the media library function within the app, that is, do you have a file server on your network where you store your personal collection of MP3s? If you're just taking advantage of the streaming service, then that may be why you're not experiencing the same issue I am. My signal strength is a steady -55dBm (+/-5dBm), which is excellent if you aren't aware. I have a Linux server in my basement that hosts a Plex Media Server service and serves music and videos throughout my cat6-wired home (professionally installed during its construction). I can successfully, without errors, stream video and music to all Smart TVs, cell phones, tablets, etc... throughout my home whether wired or via WiFi. I often have neighbors over and we hang a white sheet on the side of my house and i stream movies from my laptop to my projector without buffering pauses, or so much as a frame jitter. In the evening, it is not uncommon for 2-4 simultaneous unicast streams to myself and family members. T-Mobile is my cell carrier and I utilize my wifi network for all calls while I'm in range as well. So, when I say my problems with Sonos started after the last Android app update, I'm very confident in my assessment. Thank you.

I forgot to mention that all of my controllers are hardwired.
Not your PC as it seems. Your mobile devices do have ethernet ports?


To all those who do not have an issue with your system: Do you utilize the media library function within the app, that is, do you have a file server on your network where you store your personal collection of MP3s? If you're just taking advantage of the streaming service, then that may be why you're not experiencing the same issue I am. My signal strength is a steady -55dBm (+/-5dBm), which is excellent if you aren't aware. I have a Linux server in my basement that hosts a Plex Media Server service and serves music and videos throughout my cat6-wired home (professionally installed during its construction). I can successfully, without errors, stream video and music to all Smart TVs, cell phones, tablets, etc... throughout my home whether wired or via WiFi. I often have neighbors over and we hang a white sheet on the side of my house and i stream movies from my laptop to my projector without buffering pauses, or so much as a frame jitter. [...]
Not relevant, none of those devices is capable of multi-rooming.

You're either not reading my posts closely, or you're just trolling. Either way, you're a waste of energy. I don't even know wtf, you mean by "multi-rooming". I've been an IT professional for over 20 years now and have never heard that moniker. Go waste someone else's time, would you, cuz I'm done talking to a box of rocks, LOL!

You're either not reading my posts closely, or you're just trolling. Either way, you're a waste of energy. I don't even know wtf, you mean by "multi-rooming". I've been an IT professional for over 20 years now and have never heard that moniker. Go waste someone else's time, would you, cuz I'm done talking to a box of rocks, LOL!
Basically, that means you don't have a clue what Sonos is, muss less how it works.

my Android app selects the wrong zone and so does my ios app. They also get in a muddle about the state of the zone - it doesn’t stop playback when you tell it to and then the stop/play buttons are in the wrong state.

I’ve spoken to support on the phone for an hour and submitted emails and diagnostics but they just won’t reply.
This doesn't just apply to the latest version - I'm on 8.6 and am having the same problems. I tried support but my setup is unsupported (hard wired + EoP + wireless disabled) so they're back into their usual 'network issues' claims. I don't believe it, as my PC controller works flawlessly. As far as I'm aware, the other android devices are OK, too - it's just the phone.

Not relevant, none of those devices is capable of multi-rooming.
True, but mine is failing in a similar way even though I am only playing to a single device... It is comparatively rare that I have more than one device playing at a time.

True, but mine is failing in a similar way even though I am only playing to a single device... It is comparatively rare that I have more than one device playing at a time.
I'd try and restore the system to its supported state; enable at least the wireless cards again, this might solve the issue.