Where's my refund status changed from accepted, approved back to being processed.

I am betting that it has something to do with the change to how unemployment benefits from last year are being taxed. Since that bill was just signed a couple weeks ago. If you had unemployment income, and used turbotax to file your taxes, when you go in to the portal and click "amend return" it actually changed the amount of my expected refund, by several hundred dollars. That was the first thing that came to mind.