Nodes look very tight.. Back off on the light for a bit. This can cause nutrient symptoms in leaf becuase it starts cannibalizing itself from too much light.
Get some growth between nodes (internodes), and then adjust light as needed after that. I'd hold off on blaming nutes for anything you see until you get the plant growing properly again... if it takes a nosedive symptoms wise even with less light, then go ahead and amp that up too.
the stem between nodes is your guide for light intensity.. too tight, need less... too stretchy, need more... this growth may remain tight, so assess new growth.