hmmm. definitely something going on in that cyl. whether it’s the result of your hesitation issue, i don’t know. notice how black the top ring is on it compared to the others? all that ash on the ground strap. something going on there.
maybe try swapping the injector from that cyl to another. drive for a few hundred miles, then check the plug in that hole. maybe it’ll tell you something, maybe it won’t. but at least it’s free