Weird response from videohub

[otelom]

I have a Smart Videohub CleanSwitch 12x12 running version 8.0.1 and everything works fine but when I check the logs, every 15 seconds I get 2 debug entries:
debug: weird response from videohub (3 bytes): NAK
debug: weird response from videohub (0 bytes):

I've tried using WireShark to see any traffic to or from the videohub's IP but it detects no traffic at all.

I do have a Smart Videohub 40x40 and that doesn't have this issue and I can see the traffic on Wirershark