We've noticed an issue with UDP endpoints and the usrloc module not sending keepalive
packets to them for a long time. Eventually, usrloc will begin doing it, but sometimes
it's anywhere between 10 minutes and multiple hours before the endpoint starts
receiving an OPTIONS packet.
TCP and TLS endpoints do not have this issue - they being receiving OPTIONS after
registration + ka_timeout elapsed.
Has anyone else seen this? It can be very easily seen with a pcap on a device registering
via UDP.