system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why did the lone TIE fighter the Millennium Falcon encountered at Alderaan's debris field not react to the Millennium Falcon?

Why would a fighter pilot ignore a possible enemy craft approaching a high value military asset, especially since the TIE fighter was in an extremely vulnerable position with the Millennium Falcon directly behind it? Why did the TIE fighter continue to travel in a straight line?
gpt
It *did* react to the Millennium Falcon. It put its thrusters on full blast and ran for the Death Star. Luke even comments on how fast they're going.

It also wasn't a lone TIE Fighter. There were thousands more waiting in the wings if things went south.

&#x200B;

Best odds on the sequence of events: TIE fighter is out on a routine patrol, out of sensor range (so probably radio range, too) of the Death Star (if it was within range of the Death Star's Sensors, there would have been little reason to have the fighter out there prior to the Falcon's arrival).

TIE fighter spots the Falcon leaving hyperspace,  and immediately sets a course for the Death Star to report the arrival of an unrecognized Ship. This path happens to take it directly over the Falcon, making it appear as though they are simply travelling in a straight line.

The Falcon Gives Chase, and manages to Jam it's communications before the TIE fighter gets within hailing distance of the Death Star, but fails to recognize the Death Star as a threat before they are within range of both its sensors, and its tractor beam.