Okay, he might have learned the same way SH learned about Luffy's defeat- through newspapers.
But how would that lead to P1 knowing what Luffy said to Kaido?
That's the most random thing to bring up to Page 1 and for some reason P1 to Ulti.
when there's litearlly a chapter where Luffy clashes with Luffy because he says he will be PK and Ulti gets mad because of that.
What's more possible:
Ulti is mad because Luffy said to he will be PK to Kaido 2 weeks ago, somehow Page one found out about it and told Ulti.
Or
Ulti is mad at Luffy for what she said literally the chapter she met him and fought him?