Losing 2.4Mhz Signal While 5Mhz is Fine - IP Changing by a 3am Reset Recently - Admin Turning Off 2.4 Radio

Hello Xfinity,

Only in the last two days changes are occurring to my IP (lease) around 3am which is causing the 2.4Mhz half of my signal to change to an “inactive” mode (says changed by Admin).  The 2.4 signal is shut-off seemingly by a change of IP address being sent from Xfinity.  I would like to understand what I can do to revert my system to holding the 2.4Mhz signal.

Of course, losing the 2.4Mhz signal is causing all my 2.4Mhz-only devices to be knocked offline and remain unable to reconnect because the 2.4 stays shutoff by admin it says.  My only remedy has been to reset back to factory, reactivate modem and reassign previous WiFi login info.  This is needed each of the past two days.

Help, please.  Thank You in Advance.