Having an issue where every day, or two, or week, random my sonos integration will stop working. When I look at the device, it still shows, but has not had any activity. I can re-run the app and it will pick up the same names and double them. But the new devices will work. Then I have to update all my webcore and RM announcements. The integration worked great for about a month, then this started happening. I have completely removed the integration, deleted devices, and reran the integration. I've even gone as far as assigning the sonos a static ip in my router. I LOVE the integration when it works. Any ideas?
Mine did the same dropout issue, what I did was use a zwave plug. Then by using the ping app I test for sonos to be up, when it drops I toggle the plug
So you’re saying a power cycle would bring them back online? I don’t have to re-run the integration!
Probably, the best thing you can do is to put them on Ethernet. It sounds like a network issue. Mine are all hardwired and never had this problem.
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Thanks guys. I’m going to do some more troubleshooting when they drop again. I do have one in Ethernet. It appears to be the only one that did not double. I’ll get some more facts and update in case someone else has this issue. Going to try the power toggle as well.
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Have the same issue, and tried the uninstall reinstall with no success. Mine also a random volume bug where for no reason at all it will sometimes to annoncements at MAX volume and scare everyone in the house. Ive just been living with it. My sonos are hardwired.
I have the same issue. Random drops. Some devices are wired Ethernet and some are wireless but it happens to all of them.
Not hijacking, but thought I throw in here that the same is happening with my Google Home Mini devices. They still show in Hubitat, but just stop responding to speak commands from Hubitat. I remove them from Hubitat and re-add them and they start working again. Just in case there is a common link to our issues.
It does for mine
Four of my 6 are hardwired, but I don't have this issue with any of them. I do have DHCP reservations for them all. I also ping them all routinely to see if they are up - maybe responding to pings also keeps the network interface up ......
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I like to play on the edge 
I don't reserve IPs nor ping my devices, much like many users would. However, I used to have issues with SonosNet. It was roaming free. Since I hardwired all of my speakers 4-5 years ago, and turned off internal Wi-Fi on each speaker, I never had a problem. Having 1 speaker hardwired is sometimes worse than having them all connected to your router:
Change your Sonos system’s wireless channel | Sonos.
They recommend "using Sonos on a wireless channel that is not being used by your wireless router". I'd add OR Zigbee radio 
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Update. I did in fact only have 1 device on ethernet. But some places my speakers are I could not hardwire them. So.... I took @aaiyar advice. I setup the Hubitat Ping driver and I am only pinging 1 device (My Kitchen Sonos) every hour. I have not changed anything else. I have not had a drop since that was setup. I did create a rule where, If the ping returns a "not present" that the zigbee plug that powers it would shut off for one minute, then turn back on. But that routine has not run once. I'm not saying the problem is solved yet.....But no issues with multiple notifications since this was done. I'll keep updating if anything changes. I'll also look to see if the MySonos app will tell you what channel they are on.
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