This sounds a lot like a duplicate IP address issue. Although it might be a wifi interference thing. Microwaves are not the only potential source of interference. 

I’m assuming these ‘three offices’ are all in the same location, and you’re just talking about three Sonos ‘rooms’, since a Sonos system needs to reside on the same Subnet. 

I think you’re on the right ‘direction’ with 1., with a small modification. Try unplugging these Sonos speakers from power before rebooting that router. Wait two minutes after rebooting the router before plugging back in those devices.

Conversely, you could set up reserved IP addresses for each Sonos in your router. A little more initial effort, but more permanent of a solution. 

I have more questions……

You mentioned that one office has its own WiFi. If that be the case how can you monitor all three offices (and like ​@Airgetlam I assume you mean rooms) simultaneously? Your iPad must be on the same network as the speakers. If not then you must be hopping between networks.

If you are calling a range extender a device that generates it’s own WiFI then there may lie your problem. Please clarify what type of network you have either Router and Modem or Mesh. Also please clarify if you are speaking of separates offices not linked together or rooms with in a single space.

Hopping, not hoping ;)

1. The three offices are separate buildings throughout the metro area that have their own WiFi network.
2. For one of our offices, our IT person set up a separate WiFi “channel” for the Sonos speakers (separate from what the computers and printers use) and that did not help.
3. The iPad and the speakers are on the same WiFi network, and each office has their own iPad/Speaker set up. All are experiencing the same issue.
4. Here is what our IT person responded with when asked about modem vs router: **company name** fiber internet. Ubiquiti wireless access points. 100 mb internet speed. 

I appreciate the help everyone. While this is a nuisance for all staff, we’re a busy practice with busier doctors so updates may be slow.

Thanks!

Hi

Given you have multiple locations you might have your IT look at Sonos Professional in the link below.

https://www.sonos.com/en-us/professional/installed-solutions?priceMin=49&priceMax=1628

Also, since you’re using Ubiquity, here is a good reference. 

TBH it doesn’t sound like Sonos is a good fit for your use case. It will never be reliable enough for your situation imo. 

I’ll try to pass this along to our IT person. We’re a small team without an IT department, just one gentleman who helps us out. I appreciate the helpful assistance! Thank you.

​@VisionSpecialists 

Did you miss my suggestion? It may be helpful as well.

I’m not sure if this would work for our setup, but I will pass it along. Thank you.

Hi ​@VisionSpecialists 

Welcome to the Sonos Community!

Sorry to hear of the stability issues you are having with playing music on your Sonos system.

If you are still struggling with this issue, I recommend you get in touch with our technical support team who have tools at their disposal that will allow them to give you advice specific to your Sonos system and what it reports.

However, if you are playing the same content to all your speakers at once, you may find that changing which speaker is selected as the first member of the group can have a significant effect on the stability of playback - I recommend experimenting.

I hope this helps.

We’ve passed this along to our IT person, hopefully this helps! Thank you for your knowledge and help :)

Hopefully the Unifi best-practices will get us sorted out, but I will keep this in mind. Is there a specific speaker we should mark as first, or just shuffle around to find the best combination?

Hi ​@VisionSpecialists 

Experiment and see - there is no right answer. Generally, however, the best choice is the speaker with the best connection (closest to router).

I hope this helps.