I would guess you’re probably right about the bandwidth issue, although it might be interesting to check by wiring the CONNECT directly with an Ethernet cable.
Instead, my mind goes to a potential IP address issue, which could manifest in the way you describe, whether the CONNECT is wireless or wired…and frankly, has a slight potential to be a DNS issue further upstream than in your home.
I’d be tempted to try a network refresh, to see if that solves this. Unplug your CONNECT from power, and while it is unplugged, reboot your router. Give the router a couple of minutes to recover before plugging back in the CONNECT. This will do a few things, force a new DNS connection, force a new IP address and force a reload of the Sonos OS. My money would be on the second, but all three would be a ‘good’ thing.
However, if that doesn’t ‘fix’ things, I’d recommend that you submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. But don’t post the resulting diagnostic number here, they get sensitive about GDPR.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.
When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.
