Hmm, that does sound like there may be some issue causing the containers to not be considered ready for items. What if you try creating new containers and destroying the old ones? Also, is the save where you’re having problems the same one you sent above?
You can call _radiant.sim.topology.are_connected(hearthling, storage) if you want to test if a storage is reachable.
It should indeed be the save posted above, though I haven’t touched that one since the weekend. At least, with the latest version of the save none of the stacked crates contain any items, but the hearthlings are running around restocking stuff.
I have been seeing the issue again in a separate save game though (Raiya’s children), when I stacked urns. I think that was the point where I wrote about how I solved it.
For the lua snippet, I am lacking knowledge of how to get values for the variables hearthling and storage.
Sorry if im not quite consistent any more, a thesis does that to your brain at times.