That first pic might be a mutated leaf.
check rootzone stuff - temp, ph etc..
just becasue you feed the saem doesn't mean they will all react the same, either. Some formulas work on a wider range of plants but 1 formula and 12 plants (not clones) is going to have 1 or 2 plants occasioanlly that won't be as happy as the others even with a good formula...
I've got 1 out of 8 that's less happy pulling off the same reservoir, but it's still 'good enough' to finish without extra effort. compromises are made at a times. A 10% loss from one plant is only 1.25% across all 8, lol... i'm not putting in extra time to fix and feed 1 fucking plant, Bwahaha. Each to their own. So, i ignore minor issues that don't progress into anything concerning.