Game hangs on WiFi but not Cellular Data while every other app works on network

I turned IPv6 off on the network router and it works!!!!  This is a problem with the game coding because IPv6 is fast becoming the default standard and in places where I can't change network settings I still won't be able to play. I've done the hard work coders now figure out why and fix it please.  Any one else having this problem verify my findings by disabling IPv6 on the router.