Looks like it could be the start of Ca def. It's not going to come from molasses in any useable amount; you will need to use CalMag if you are treating a deficiency.
In any case, I would lose the Open Sesame until you get the pH issue sorted out and stick with your base nutes, flush out the plant in case you DID OD it on K from the pH battle, and feed with just your base nute at correct pH and a little weak for the first watering.
Also heat stress; switch from active intake to active exhaust with passive intake for more efficiency.