Disconnect and reconnect over and over on menus X1

Heya guys haven’t been able to play a game online on Halo Wars 2 since the 22/05. It connects to the servers then says “downloading data” a few seconds later it will disconnect and say “Data Unavailable” the reconnects and repeats the process endlessly. I have left my Xbox on for hours in the hope it will resolve this but is hasn’t and was still endlessly doing the same cycle.

I have cleared my cache, reset my router, reset my Xbox and reinstalled the game all on seperate occasions and it still does the exact same thing

Has anyone else had or having this issue or know anything that can resolve this?

Ps I can play any other games fine online

Have the same problem in the menu. Really annoying.

Are the accounts linked to your profiles the ones you use to play on Xbox Live? If not - please leave your gamertags.