Rank Reset in Arena After 10 Games in new Season

Me and all of my Friends löst our Ranks ! 10 Matches yesterday and No Rank today.
And this has nothing today with Xbox live. I played 6 Games today and still no Rank?!?
How could this happen. I could even provide pictures proving my case with Time Stamps

I got a tweet today from Halo saying the new season just started. The ranks always reset with the start of a new season.

I started yesterday with the new Season After 10 Games I got my new Rank and today everything is lost

The season was re-rolled yesterday after issues with players obtaining higher placement ranks than intended. If you made your placements yesterday you’ll need to replay them again today