im wondering if anyone else has problems with recognizing people that you know, but they arent expected to be at (or in the place) where they are suddenly seen.? (i dont know if i made sense there or not

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and has anyone ever had that happen with someone they knew well? like i cant think of anybody else that ive seen and been around more than my parent... but it even happens when im out and see her, where i wasnt expecting to see her, or in a different place than what im used to seeing her.. and its really not even a "oh i know this person... but from where?" kind of thing.. i just plain dont recognize them. then after i can be "stareing right through" them, i notice they are looking at me, and then i start feeling weird because i dont recognize them. and after that process is when the "i know this person.... who are they?" comes in. and then im able to finally figure out after some more "face searching".