I have had the same issue since my install in September. I was also told that it is a vendor issue with the cantenna and that my ticket is part of the master ticket which has yet to be resolved. After going dark all Thanksgiving Day, I demanded a new cantenna which they installed the following Saturday. Disconnects have dropped significantly and have been aware of only one or two since then. I have a MBR connected Wifi as WAN with the Verizon modem and have alerts notifying me whenever they is a loss of signal.
With the original Cantenna I was also being shown usage of around 15mb per day even when I was out of town with nothing connected to the system. Verizon said that it was my usage not their equipment. After the new Cantenna only using 1-2mb per day under the same conditions. So much for Verizon tech knowledge. I believe that the system disconnecting/connecting throughout the day may have been the cause of this excess data usage. You might want to check yours.