Also, I was curious if extending the DHCP lease from the default 24 hours to the HALNY's maximum of 3 days would change anything. It did not.

@woozle After changing the static IP on the BE230 to 192.168.33.50, I could access the config through that address, and not the one reserved on the HALNY.

@woozle I'm unable to upload the image, so I'll just type it out. IP Address 192.168.33.5 Subnet mask 255.255.255.0 Default gateway 192.168.33.1 Primary DNS 192.168.33.1

Having the exact same issue, I'm using HALNY HL-4GMV for a fiber connection and BE230 for WiFi. I've already made a DHCP reservation in the HALNY router for the BE230 and set it to static mode, but...