Hey, I have recently re-signed up for VMB and got the Hitron CHITA. I have set it to bridge mode as I am using my own equipment (Ubiquiti UDR) and I have had my own set of issues, but so far they were related to my own router needing a factory reset (my problem) and then random dropouts on the CHITA's side every 5 minutes.
This latter thing seems to have resolved on its own. I have called them up once, they took me through the usual 'we sent a signal to your modem, please turn it off and then on again' stuff, but that didn't fix it. 3 days later the issue resolved on its own.
I was able to confirm it's VMB's problem because all packets pinged on my LAN don't experience this drop out, but the first hop outside to VM's IP, would lose 2-3 packets exactly every 5 minutes, I have pretty good proof of this via PingPlotter and TBB's monitor.
I can't say much about using the CHITA as a router/hub because from all my past experience using VM's supplied hubs, it was always 'just okay' and I would not normally recommend it.
To me it sounds like something is dodgy with your unit. I would actually reconfigure the WiFI to be your own custom name and passwords and disable WPS, if I was using the Chita as a router and wifi AP.