Hi @rossian, welcome to the Cayenne Community!
My initial thought here is that this is not actually the network that you're viewing the Cayenne dashboard from, since the way our Pi software works is to send data back to our cloud server which can then be viewed from anywhere with an internet connection. So even when you're on your local/home network, when you view your dashboard at cayenne.mydevices.com, the data is still going Pi --> Internet --> Cayenne Cloud Server --> Browser.
I'm thinking perhaps something has locked up on the Pi or with our agent software itself, or with your home internet connection. Do you have access to your home network where the Pi is installed now? I'm curious if it is still showing as Online and with updating CPU/RAM/etc values from that side. If not, it may be worth just giving the Pi a reboot to see if that kicks things back into gear. Our Pi agent software should start automatically on reboot.