Can you look at my post here: Tips & Tricks - Resolving random issues impacting Sonos devices.. | Sonos Community

Also, are you using a Mesh wi-fi system?

Are using unifi AP without mesh

All my devices om my network have fixed ip. The mac address is used in my router to assign fixed ip the devises using DHCP…

My WiFi is not using the 2.4ghz challel that Sonos is using.

Are any of your devices connected via Ethernet cable?

@ratty May need to jump in here. :)

All Sonos is connected to WiFi.

But I got it to Work.

I created a extra ssid 2.4 ghz only for Sonos, that helped, now can i see all Sonos devices...

Unifi is the key issue here, IMHO. The controllers that are not seeing the speakers are likely connected to a different subnet created by the Unifi system.

I’d echo @UKMedia ’s suggestion about running in wired mode, with one of your Sonos devices connected via Ethernet cable to the ‘base’ Unifi device, not one of the extenders. 

I’d also suggest looking at many other threads from folks running Unifi networks, I certainly don’t, so am somewhat making an educated guess here, but certainly other’s experience might help.