just on new growth? it's minor.. i'm trying to figure out what's causing that on one of my plants too.
just needs a slightly different balance of feed or whatever, you know?
i bet it is growing vigorously though, eh? Looks like an awesome plant.
after looking through the week -- do you bottom feed? maybe give an extra water-only irrigation between next feed. if the wrinkling or color you see ( i can't see in pics, so can't give opinion on it) improves slightly, keep that extra irrigation in for a week or two of fertilization cycles. Can ramp up again as it fully colonizes pot with roots.