Most of the SSHs I've grown over the years have been the most picky plants ever. The bud quality will still be top shelf but the plants are usually ugly as hell by harvest. If I go to low in the nutes I notice premature yellowing, if you go to heavy you get burnt leaves. I think the best way to handle it is stop N early in flower then just feed low PK until harvest. Sour diesel has always been the same way for me, every other plant will look great the sour d is a mess.
What I’m seeing is that she’s been consuming some of the nitrogen on the fan leaves... she wants to be fed.. but she is nitpicky