Seems a bit Monty Hall-ish. You updated when B got out on 2 but didn’t retract your update when B re-entered. After your update, C—or maybe you were thinking “the remainder of strangers on this elevator”—had near certain chance of getting out on 3 so when B came back in it looks like you mashed the two together as “the remainder of strangers on this elevator”.
I have no clue if this phenomenon has a name or not.
Seems a bit Monty Hall-ish. You updated when B got out on 2 but didn’t retract your update when B re-entered. After your update, C—or maybe you were thinking “the remainder of strangers on this elevator”—had near certain chance of getting out on 3 so when B came back in it looks like you mashed the two together as “the remainder of strangers on this elevator”.
I have no clue if this phenomenon has a name or not.