FIRST GROW_Auto_ afgh x blkbrry—HELP

Alright, so my cat got into my grow room and went crazy. 2 soldiers down. Left with three. Two seemed ok while the third looked mangled. Once the damage was repaired I watered with the first go at adding nutes. I used Jobe's fertilizer sticks (13-4-5). Since I knew that would be too many nutes for auto's I diluted the sticks in water and did a test with 1/8 1/4 1/2 of the recommended dose on the packaging. However, as the pics show, I have a nutrient issue with one of them. I NEED HELP to identify what the issue is. This plant received 1/2 of the recommended amount of fertilizer. I was thinking perhaps I should do some leaching, which I understand is where you give a good amount of ph neutral water for two or three watering cycles before progressively starting to feed again. ANY ADVICE WOULD REALLY HELP! Stay safe friends.