No, not me: my system is stable and functional. 

Yes. 

Nope, same as ​@nik9669a , no issues. 

Once I set static/reserved IP addresses, a long time ago, I’m in the stable group.

Before doing that, not so good.

I did the same thing as ​@Stanley_4, (static IPs) along with other configurations that Sonos needs to work inside a network with managed switches. I replaced a few speakers during the summer last year with no issues.

The vast majority of people that are enjoying their Sonos system, wont be reading this thread. There will be a few exceptions, myself included.

I’ll check into setting that up- never heard of it; thx 

List your router make/model and we can probably give you a link to instructions on how to reserve IP addresses.

While setting the reserved addresses take a moment to give each Sonos a decent name too, it can come in handy later.

Another here with reserved ip addresses. Maybe I should have said in my earlier reply. It does seem to make a difference on the reliability and stability of systems - including mine.