I really can't figure this out. I have a bunch of crates set up, but for some reason my pawns are filling them up, even though the storage allows the items.

https://imgur.com/a/upnGoS0

As you can see, the crate still has lots of spaces left, but for some reason it keeps saying there's no storage for my items. Is it acting like the crate only has space for 4 stacks max? It doesn't seem to want to fill up more than that.