I have updated the X3000 to the latest firmware (4.4.8) and noticed that my browser prefers IPv4 over IPv6. I have NAT6 enabled on IPv6 to bypass hotspot restrictions.
Fixed an abnormal IPv6 network issue when IPv6 NAT6 used the ddxx:: prefix.
https://dl.gl-inet.com/release/router/stable/x3000/4.4.8
How to get the browser to prefer IPv6 again?