Unable to connect tothe Halo5Guardianslobbyservice

I got Halo 5 a good while ago and since then I have been receiving the message Unable to connect to the Halo 5: Guardians lobby service. Since then I have done as much as I can to get this sorted. Router reset and factory hard reset, Uninstall/reinstalling the game and contacting Xbox support but all to no joy. Sometimes I can see what I think is the matchmaking lobby ( At least i think its the lobby but as it never fully loads before the error I can’t be sure) but it just fails to load I guess and boots me back to the main menu where i’m then greeted by the lovely error message when i try again. Anyone else having this issue? More importantly, anyone had this issue and got it sorted? Please post if you did!!!

I too am having the very same issue. It assigns me
to a match, then right before the deploying promt
comes up, I’m booted with an “connection lost, you have been disconnected from local network”. I too have done the whole power cycle thing, even bought a new router. Some help would be greatly
approciated.