I think this is Margaret Hamilton's software in action. It had triple redundancy so despite the hardware glitches that generated the 1201 and 1202 alarms, the flight system did not crash and guided by Armstrong and Aldrin led to a successful landing.
youtu.be/zfNhkYHrfj0?...
youtu.be
First Man (2018) - The landing scene
YouTube video by Mydriaze