Both the web interface and connections are down now. Was just fiddling with my private DNS serving both my local network and tailnet, when I lost access to the device listing around 20 minutes ago. Now I also cannot connect through tailnet IPs anymore. EDIT: took me a good minute to realise this too, as I thought I'd just screwed up something in my Pi's ipv6 configuration for the 3rd time in an hour.
P.S. you beat me to posting by 1 minute! Happy to see there was an option to hide my submission, never needed that before.