I would say its just poor firmware on the Hub displaying messages that aren't really relevant. If all is working to your satisfaction as expected - ignore it
The odd wifi drop out can be eliminated as well if it bothers you but might require you to invest in better wifi equipment
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 1 WiFi, 1 on PA) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's. On 250Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.