Factorio Forums

If I have an assembler with items in its ingredients slot(s) on a space platform and I deconstruct the assembler, then the items that were inside disappear instead of going into the space platform hub. I'm pretty sure this is a bug because it is possible to manually remove the items before deconstructing the assembler.

There are some items that are considered a "low value" and are better voided rather than moved to hub because they could easily cause hub overflow. Default list of items that are moved to hub are: modules, items that build entities, items that build tiles and non-intermediate items if they cannot be obtained from asteroid chunks. Since you are not specifying which items are being lost, this wont be considered in terms of bug or not. Mods may change this behavior by setting ItemPrototype::moved_to_hub_when_building flag on each item.

It would be nice if the information move-to_hub was available somewhere, perhaps Factoriopedia. It would also be helpful if the concept was introduced in the tips and tricks for the space platform. Right now it is somewhat trial and error. I ran into this removing an assembler that was partly loaded up with parts to make a rocket silo. Now I assume that everything will be lost and manually move everything to the hub.