What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
Yes I would factory reset and setup from scratch using a wired PC and web browser. You might even do this with the RBR off line and turn OFF any RBS. Setup again using same SSID name and PW. Use MS Edge or Firefox for this.
I recommend changing the default IP address pool range on the RBR to 192.168.1.100 to .150 or .200 depending upon how many devices you have all connected. I have around 35 here and use .150.
When you apply the change the router should reboot. Reconnect the RBR to the ISP modem.
