I wanted to post this to hopefully save others time troubleshooting.
I'm using CW9172 Wifi7 APs at home. On the MR 31.1.x release I had an issue where my Sonos Sub (v3) would constantly fail to connect to the wifi. Event log showed lots of 'dhcp problem' messages. This is now fixed in MR 32.1.4. My Sonos Arc could connect to the wireless on both releases.