The cause of the downing of the Israeli F-16 was initially announced to be due to a malfunction in the aircraft,
It was later corrected to say that it was due to the pilot's failure to reduce altitude and stay below the radar horizon.
In other words, the popular legend that Western aircraft could fly comfortably at high altitudes and that electronic jamming would completely disable SAM was a fiction.
Since then, Israel seems to have consistently adopted the tactic of fleeing below the horizon as soon as a missile is launched.