Automated logistic requests from Platfrom to Platfrom in the same orbit (space location) using vanilla mechanics.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Related to roboports and logistic robots.
When a quality item is requested the sender will send simple quality instead. If the sender has no such item, an empty rocket is send. This will cause an infinite loop of rockets, since the request is never fulfilled (in either case).
Thank you for the report. Fixed in latest release.