In these kinds of incidents, the steps that led to the final outcome are more causes than the actual ingestion. Why was the engine on? Did it need to be on? Why was the worker anywhere near a running engine?
I'm guessing we'll find out it was very similar to the other recent death due to this. Staff is being pushed to go as fast as possible and being punished for not going fast enough, then the carrier says "we told them to follow safety protocols, it's not our fault"