For the disk space consumption, that’s an ongoing mystery. It’s iOS reporting a number that doesn’t match any of the ground truth numbers. There’s more discussion about it in this thread: Disk space used by Arc Editor
But the gist is that iOS’s number doesn’t match the database size, the iCloud Drive size, the AppGroup size, nor all of those combined. It’s some other number, much higher than those combined, that is pure mystery at this point.
It’s presumably something outside of the app container, app group container, and iCloud Drive folder. But that iOS still thinks should be counted against the app’s total, even though it’s not something under the app’s control or making (so far as we can tell).
So at this point… there’s not really anything we can do about it! I might have to escalate it to an Apple tech ticket, to get someone to look at it on their side. Whatever it is, it’s not anything visible to us.