This is the first time I have encountered any problem like this and I have had xbox for 8 years, only seems to be on the Xbox one.
I use the Virgin Media SuperHub 2 Modem/Router.
Have 2 xbox ones connected up - one uses a wire connected directly from the SuperHub to the xbox the other is Wireless.
We go to settings and it says strict - we have done everything that has been wrote before like holding all triggers then making it say open when you go back - that works for about 10 mins at most then goes strict again and boots us out of any game that we are playing online saying that we need an internet connection to play.
We have also port forwarded all ports that have been listed and still have a problem.
What else can I do? it keeps going from strict to open back to strict again.
Thanks for any help.