There was no checking for a while thus little need for resources needed for checking (there was still some because people still came into the system.) Now there's a big demand for renewal checking and it's working on a basis of dropping people if they don't complete it even if the problem is on the state's end. And, yes, it's completely unclear how many--because the red states want these failures, they're not keeping track.

It's the usual garbage of putting roadblocks in the way of benefits to keep down the amount paid out.