Are you sure the timer is working right? Are you SURE it's set right?
The plant is throwing single leaf sets near the top. That indicates to me, your having a lighting problem....As in time of on/off. It's stress showing....Generally indicates that the plant is attempting to bloom with long times or that the plant is attempting to re-veg...
I have not seen auto's do that. They usually have at least a 3 leaf set.
Flat out, you have something going on with lighting times.