Budding Issues

I'm 3 weeks into bud, I gave my plants nutes sunday morning and monday some of the leaves turned and ugly brown dying color and are easily pulled off, they are all inner leaves, where the stocks meet at the stem, any suggestions?

this is only happening on one plant, my biggest.

the plant is just shedding. it's fine.

Do you have a pic?

This happens at week 3. hand feed them with some veg nutes. Two 1/2 dosages should do the trick. I like to get it fixed at week 3 or 4 and should give it enough N to get through the rest of the grow.