Poor information control. For people who talk big about hybrid warfare and stuff, we do a lousy job with building narratives.
@SQ8 laid out the right approach.
We should've said:
"Yes, a JF-17 was lost to an accident. Fortunately, there are no casualties or damage to surrounding areas. AHQ is now beginning an inquiry to determine the cause of the accident. AHQ will also start talks with Pakistan Aeronautical Complex to replace this unit as soon as possible."
So: avoid the word "crash" and end the statement with something about PAC and our ability to replace this at-will. Let that last point drive the narrative (i.e. no one's stopping us from replacing this unit).