Captive Portal issue when connect to Hotel WiFi (GL-MT1300)

ok, I have been to many hotels across the US Hilton, Raddison, etc and never was able to access internet on my MT1300. Captive portal never popped up (“DNS Rebind protection” disabled) when connected to their network. Tried this instruction as well Captive Portal Strategies - #2 by groentjuh

can devs do anything here ?.

Can MT1300 connect to their wifi or not connect at all?

Yes, i was able to connect(open network), but was not able to access captive portal page.