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If you're having trouble setting up a packet sniffer (usually requires a hub), there's this trick I've used in the past, which I think could work for you, especially since it's the same time every week!
It's essentially a little fake-out. Like this:
1. Take the controller off the network (e.g. unplug) OR give it a different IP address.
2. Put a PC on the same network with a fixed IP Address (the one that the controller had been using).
3. Run Wireshark & wait for the traffic to come in.
Have you contacted our support team about this? (Best via email: firstname.lastname@example.org). They've helped lots of customers w/Wireshark, etc. The fact that you're seeing reboots also makes me think you should talk to support.