Frequent disconnects with G34 Arris

I recently upgraded my modem / router to an Arris g34 to take advantage of the recent speed increases.

Ever since upgrading I am having random disconnects / pauses in my service.  I will lose connection for anywhere from 20 seconds to 2 minutes.  Lights on the modem remain steady and there is nothing in the logs.  I had disabled IPv6 as part of troubleshooting.

What other troubleshooting steps can I take?