It was either a test or a flex. It was certainly not a mistake in terms of…oh, I accidentally uploaded a censor list to the platform.

the error was that it didn’t show the curated results they intended and instead showed nothing

Normally I’d apply Hanlon’s Razor and give the benefit of the doubt, but Meta lost the right to charitability long ago and deserves no such kindness or respect until they have a long pattern of acting in the public’s interests.

Likely they were training their AI to lean right and it went nuts. No human would be dumb enough to sign off on something that blatant.