Problem was they didn't see it on the field and the only angle to see his foot was cut off the screen.
This one like the PSU touchdown were clearly bad calls, but on this one you could not see his foot and in the PSU game you could not see where the ball went after he pulled it back.
True for LSU he would have had to have cut off his foot to not land in bounds and for PSU he would have needed to have grown 4 foot arms to score, but if they can't see it they have to leave it as is.