This is a weird bad beat scenario, I think.
I was playing a 3-day weekend of poker in LV. I was doing fine my first day when I was dealt KK. I raised, pre-flop, and was raised all-in by a relatively short stacked (opponent, maybe 3x my bet). I show my KK (confidently) only to see AA. Lost.
A day later, I was in the HJ with KK. I raise, pre-flop. BB raises, I call (I have position and assume I'm ahead). Queen high flop and BB bets. I call. Blank on river and BB bets again. This is a little less than 1/3 my stack so I go all-in. She shows AA. Lost.
While this wasn't exactly "back-to-back" (it was the two times in a row I got KK) AA vs KK, has anybody had this annoyance?
Note: To add insult to injury, the next time I had KK I made a set.

Lol muck pre obv when they have AA

Im pretty sure this is the first time in recorded history anyone has ever lost KK to AA twice.

Pics or it didn’t happen.

I had a long running deal where K-K beat A-A in my pots, whichever I held. Thread title reminds me of a hand where I had kings, raised it, heads up with one of the blinds. Flop K-7-2 rainbow. He checks, I bet he calls. Turn A. It was one of those deals when I just can't tell you how sure I was I was good even when he check-raised me. Gawd it was beautiful for him. He limped with aces heads-up in the blind, ended up against top set ... and crushed it. I mean on the turn, I was 100% to be good in my head. I just didn't smell it. Somehow, right before he turned it over, I had a foreboding sense I had just been punked.

This has never happened before

I think op is trolling. I've seen threads like this on reddit lately. Either that or the games are about to get amazing.