I have savegames from just before and shortly after. Let me know if you still need them.
Observations:
Drones are all at the identical position so that they appear as one.
They are moving their arms as though repairing, all identical.
If I run the Skunk into them, they bust into a swarm that slowly moves back to the original position.
Moving the Capship back to the sector does not cause a change and the construction drones still do not return.
Two fighter drones were left behind in a different sector, but when I returned they started moving toward the Capship. So their behavior is different.
Hope this helps.
