I just had a situation where I had requested a document from a direct's direct (in order to be efficient). The direct's direct sent the document with a very obvious and sort of careless error. I reminded them of the error (I admit my feedback was too direct) and the direct's direct was argumentative that the mistake was not obvious and when I asked to explain why they thought so, their response was "they are too busy to explain". This happened over messenger but was a bit of a tantrum. This person has a reputation for tantrums, although is a talented prospect.
How would you deal with this situation as the person is not my direct?