I noticed with larger entities (first crushers in Krastorio (7x7), then tested in otherwise vanilla with refinery, rocket silo) that bots don't always place it, and instead get in a loop rolling towards and away from the ghost. With refineries, it seems like they fail about 1/5 times, and rocket silos they fail about 4/5 times. If I remove the ghost and replace, eventually they will get it. It seems kinda like they're trying to place a smaller entity, but getting in the way when they go to place it. Video demonstration https://streamable.com/2o3bdl
Removing and replacing the ghost works to get them to place it, though it may take a few tires.
Edit: On 1.0, and construction drones 0.6.10
