Just spitballing here... but maybe Weiss’ plays are quite challenging and require a lengthy progression. Due to our O-line there is a lot of pressure on the QB and maybe JMc and Noah are not making it through the progression before bailing and scrambling. There was a definite change when Fortin entered the game. He was either working through the play progression or had different plays. He made a mistake on play 2 by lowering his shoulder at the end of his run against a LB. Then hit in similar fashion attempting to score resulting in a shoulder injury.
I personally think there are some po