MR80 Randomly Blocking Access

I recently upgraded my modem to a Nighthawk CM1200. I already had an MR80 Router with 2 Satellites which was working fine with my old modem. The router is now randomly blocking access to all our devices except my iPhone. I have to login to the router and turn off the access control completely. I can't even choose specific devices to unblock. Any suggestions?

Firmware: V1.1.7.12_3.1.108

Thank you!