I'm sure there's a logical explanation for that.
Given the expression of the "Secretary" in the penultimate panel, we can conclude that she will allow him to proceed, into the jaws of a trap or a forewarned "Hero".
Well, either that was some random glitch, or some bit of FORESHADOWING.
Gee, I wonder if this hero has any connection to Burk. 7_7
Well, his identity ("Burk") is a partial match to who he really is, apparently.. Nothing weird to find on this page. Does Burk have an embarrassing last name or something?
And I don't think that secretary is meant to keep people out...
I'm guessing the Hero is like Burk's brother or something...