Disconnect:Out of Sync

I have played 5 games today. 4 of them, halfway through a very strong rush (so around 5-8 minute mark) my game kicks me back to the main menu and says “Disconnected. Out of Sync. The game has gone out of sync with other players.” I am playing on a Series X with open NAT. I play Halo Wars 2 ALL of the time and only today has this happened with this error message. I have lost a ton of rank from this and it’s ruining my experience with the game. Does anyone know a fix? Is this a common issue?