Its never worked. For years our FBs, Lineman and TE's completely ignore ANYTHING but what the play is designed for. There is no AI there, its just scripted.
I understand plays like this happen, especially with a young, or inexperience fullback and TE. But for him to literally run right by the blitzing LB and for the TE to just wander on past the LB without even looking at him? What the heck is the awareness attribute even for?