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I have had the exact same problem that has been increasing for months. Yesterday evening I rebooted the router 5 times within 3 hours. So far this morning ,2 times. In the beginning when still under warranty and not knowing what I was getting into, I requested a replacement. I used to call verizon support but I got sick of spending 30 minutes each time on the phone diagnosing a problem that seem related to the router than any set up on the laptops. It becomes insulting to know that support knows of the issues but they continue to distribute these undependable routers. Although my wired desktop has no problems at all connecting my experiences with support has left a sour note and I will be converting soon. It is unfortunate you had to invest in another router/ to get the service they should be providing
My recommendation for anyone in this situation is that here's probably nothing wrong with your devices and get rid of the westell ASAP.