Concerned about XB8 firewall settings getting changed on reset

This happens too frequently to be a fault and appears to be a default setting for the gateway, when it resets/restarts on command from Xfinity. It continually drops from medium setting, which is where I set it. to low setting, which doesn't provide as much security. Has anyone else noticed this and is it something that should be fixed by mfg or xfinity, so the firewall settings stay where the customer wants it set? TIA