RT-AC86u WAN LED red, but still able to browse from LAN/WLAN devices?

I first noticed this today after performing a hard reset on the router. The router did an automatic FW update, but then I had a hard time getting the browser page to load the router's web gui. I then put the router in rescue mode, ran the FW recovery tool, and the latest (Version 3.0.0.4.382.18219) FW for it. I set up the router, set up manually assigned IPs around the DHCP, put some devices on the bandwidth limiter, and press "Reboot" after all the settings have been saved. Then the WAN LED...

RT-AC86u WAN LED red, but still able to browse from LAN/WLAN devices?