I have two ISPs, each connected to a different port: one to the WAN port and the other to the WAN/LAN1 port. All WAN links appear to be up and working. However, I am unable to configure load balancing across both the WAN and WAN/LAN1 ports. Load balancing is not functioning, as it only considers the WAN port. I am also unable to set online detection for the WAN/LAN1 port. I've searched through the forums and can't seem to find anything related to my problem. This is happening after a factory reset. I tried to reboot and upgraded the firmware to the latest version, but the issue persists. When attempting to enable bandwidth-based routing, only the WAN port appears as an option. When setting "Online detection", only the WAN port shows up, and the WAN/LAN1 port is not recognized.

Note: It's a refurbished device that I received as a replacement for my original ER605, which had failed.