First noticed with accidentally transferring all of my inventory through a chest transfer - any blueprints that are dropped into a chest and then 'moved' to the other chest are erased (or to be more correct - destroyed and a blank blueprint is placed in the receiving chest).
This is quite unfortunate for blueprints, but its even worse for factorissimo buildings - if a factorissimo building is transferred through a chest connection it will loose its tags thus rendering the area it was linked to (either surface or allocated space) inaccessible forever. I guess doing a check of the transferred item and not transferring anything with tags would be too high of a UPS cost?
Is it possible to add a shortcut / menu button to run a check of all factorissimo buildings (as either placed entities or item-with-tags) and drop any missing ones to either the player's inventory or on the ground in front of him? Potentially with an option to delete all item-with-tags versions and drop them at your feet - effectively summoning them all? Alternatively a way to 'delete' any surface/chunk/area along with any items/entities contained within the factorissimo buildings that arent placed and dont have their item-with-tag in existence?