I have an arc ultra with 2 era 300s and a sub gen 3 setup in my living room. I also have an arc, 2 era 300's and sub gen 2 in my basement. Ive had the ultra arc since it's first release as well as Sonos arc with no issues. Recently, during the month of May both arcs have disconnected from the 300's and subs. All speakers play independently but do not play when attempting to connect as a surround set-up. I've reset all speakers, rebooted the router, rebooted my phone, unplugged and plugged things back in, contacted Sonos support only to have them walk me through doing the same steps I did before. The end result was support telling me that there is a known issue with the arc's that they eventually will stop working in a surround setup wirelessly and must be hardwired to the router. I explained that I've never had any issues with both surround areas and to me it seems to be a software update or app issue but they stood firm in stating that it's a hardware issue. When I asked for replacement arcs, they said they would not provide any as the issues will eventually happen again down the road. I told them that this was unacceptable as the whole reason for me investing in Sonos speakers was for the wireless setup and that I cannot hardwire both surround areas to a router. Support stood firm and stated that there was nothing more that they could do. I've spent thousands of dollars in Sonos and to not be able to use my speakers in a surround set-up as advertised is highly disappointing and unacceptable. Has anyone had any issues recently with the arc connecting to their surround speakers? Does anyone have any suggestions on how to fix the issue that I have not already listed above? Please help as I am highly upset with the response the Sonos support team has provided me