Tomato Leaf Problem
Most of the plant looks great and is flowering and producing new fruit but on some of the new growth near the top the leaves get darker and very shriveled & dying. I've looked up a bunch of things it's good but none exactly match what I see on my plant. I am think some sort of nutrient defenciany maybe but I don't know
I do agree your plant looks very healthy.
Check the articles below, but I would also suggest feeding them with some Epsom Salt.