I have seven Pis in my account and five are reporting UDP mutilateration traffic is being sent but not reaching Flightaware.
69773 and 37955 are located remotely and feed through completely independent internet suppliers. 37955 is merely reporting a version error and not an UDP error.
One located at this site feeding over dodgy WiFi is not reporting UDP errors.
Not experiencing any other network errors and Speedtest and traceroute tests to Flightaware.com seem OK.
Is anyone else seeing such errors?