Well, I'd have assumed the same, except an admin and others have said that's not one of the default error messages. I'm not wasting my time getting locked out of my account to prove or disprove it.

But considering the attempt to clarify mouse admin made, if that was a too many incorrect password entry lockout, wouldn't he have said so? He said it's not one of their errors.

See the Tumblr post here: https://aequorin-fr.tumblr.com/post/665532369163403264/lockout-still-hasnt-been-explained-tho

That's why I assume malice over boomer.