When trying out this neat feature from 1.1.0:
Ghost build can be used to fast replace non-ghost entities, which results in an upgrade order with (optionally) a direction change order.
See : https://i.imgur.com/OY2wYz6.png

The drones don't seem to be able to handle the change of direction. They'll go and replace it, but end up replacing the belt with the same belt, the upgrade doesn't go away, and they just go back and forth in an infinite loop.

This is why the mod isn't updated for 1.1

Is there going to be an update to the API that allows a mod to find out what the new direction should be?
A 'get_upgrade_direction()' on LuaEntity?