Here is what happens on that play
Schwartz gets beat badly on that play. Immediately after Schwartz engages the defender, the defender smacks his hands off of him. Schwartz tries to re-engage, but it's too late and Schwartz was too slow, so he can't get in front of the DE. No way Mahomes is stepping up into that pocket because Fisher is being handled and was being drove back towards Mahomes and he sees the safety that is spying him so that he doesn't try to take off up the middle.
It's a good thing that Mahomes runs the way he does, because if he steps up into the pocket and Fisher keeps his guy from getting him, then he is more than likely going to get destroyed by the guy that beat Schwartz because he is bending around Schwartz and as you can see Schwartz is trying to push him out of the play, but when an O lineman looks like Schwartz does in this last pic there is literally nothing he can do. Schwartz is off balance and can't recover before the end gets around him.
On a side note it does look like Schwartz is favoring that R ankle and is having a tough time putting weight on it. Especially during this play.