beat me to it, was just gong to ask about temps..What are your temps? What kind of lights and how high are your lights? That looks like pictures I have seen of light/heat stress.
I thought light leaks didn't bother autos, or am I misinformed?High N levels in flower and/or heat will do that to a plant. Im not seing "rounded & unserrated" leaves at the top of the plant so I dont suspect light leaks or revert from flower to veg. Looks like a temp issue.
Your probably right..... I dont grow autos.I thought light leaks didn't bother autos, or am I misinformed?