It was made the clearest to me when I interviewed a colleague who had left to another company and two years later was interviewing to return. I knew he knew everything and had the skills for the job because, well, I know him, I’d worked with him before. He’d done this very job previously. Yet he still performed terribly in the interview and (rightly or wrongly) I had to base my evaluation on my knowledge of him rathe…
FWIW, all of my friends who somehow managed to get into FAANG or other top tech companies swear that were they to go through the interview again, odds are they would fail. This despite all of them being great engineers.