I had to create separate deconstruction planner to avoid this crash. AFAIR it is not limited to harvesters but also affect planet teleport or its entities(chests,loaders,pipes), would be nice to fix too.
It would have been better to report it instead :) but it's fixed.
I don't understand what you are speaking about now, because nothing else is making crashes ? And only the warpgate is minable / deconstructible with drones (and it doesn't crash), other entities (chest, loader etc) are not ?