As you can see the harvester takes damage whenever this happens, but it means that there is more orange to harvest. The orange must flow! 🙂 I manually spawned these lumps in, they actually occur ‘naturally’ when there is less than 40% of the orange to mine. They can spawn anywhere, and don’t appear on the minimap – so it is worthwhile to seek them, as your harvester can mine even when you think all the orange is gone 🙂