Even if your version were true, the DB is already breaking on the ball here:
He is leaping to high point the ball from the 46 here.
There is no route adjustment that puts the WR between the ball and the DB. The ball is going to splash down inside the 45, where the receiver is headed whether he knows the ball is coming or not.
No way that Haener was coached/advised to make that throw in that area of the field against that coverage. The pass is DOA as soon as he starts to wind up. My best guess is that he fixated on the trailing DB and didn’t see the one playing over the top.