Server Version#: 1.21.2.3939
I think this started after the latest update today - basically, the BANDWIDTH real-time graph is showing constant “0” (for both remote and local) on the Dashboard. It was working fine yesterday!
Changing from “Real Time” to Last 12 Hours actually shows traffic… so I’m very confused!
I’ve rebooted the server, it’s still showing 0 for Real Time traffic. 
I’m curious if anyone else is suddenly experiencing this, as I haven’t changed any settings anywhere…