I just got locked out of Twitter for including @FBI

Super strange things, but my only clue is I replied to someone’s tweet and in the reply I included @FBI.

@Anti_USA_Dems @NBCNews I think you meant to at @FBI I’m pulling them into the loop for you.

This is the tweet that started the lockout

IMMEDIATELY after hitting send, my account was locked. Here is what twitter shows me:

After I clicked start, it showed me my phone number. I clicked submit for them to send me an SMS verification code, and immediately is gives me this error. Something is weird.