I have 3 Sonos speakers: a Play:5 a Play:1 and a playbase. Last week I noticed there was an update available for my system, which I installed. After the update I have problems with the IOS controller. The play:5 and playbase are disappearing from the controller all the time and only the Play:1 is visible. This only happens on my iphone with the ios app. On android all speakers are visible all the time. Sometimes it helps to have the app scan for new devices, sometimes the speakers just reappear again after some time. It's pretty annoying as my iphone is my standard device.
I've reset the app, deleted it and installed it again, restarted all speakers by unplugging them, shut down my router, reste the wifi etc but the problem still exists unfortunately. As it only happens on IOS it seems more like a problem with the ios controller than anything else…..