I think he was in the process of getting drilled, which caused him to not get all into it. Adams has a TD if it's close. But...he was also running out of real estate (Adams would've been in the end zone).
So, I was in the first row of the end zone that Adams was running towards and made two observations. The first: it was the correct read and if QF lets the ball go when he does that slight pump fake, it's a wide open TD to Adams. The second: after he pumps and then decides to let it go, he knew he was going to get drilled and leaned on his back foot to let it go.
The good news is the read and the play were there, just gotta execute it and if nothing else, slightly overthrow that ball.