Update: I spent all afternoon going over every plant with a fine tooth comb to no avail. The most messed up plants were unremarkable. The worst looking plant of the bunch (first and second images - underside of leaf and petiole) is spotless as far as I can tell
But, I do have four very young...
For the life of me I cannot figure this one out and i happening once every few grows.
It is not bugs. I repeat, it is 1000% NOT bugs. Freshly sanitized grow with IPM schedule on point and confirmed by microscrope.
The new growth starts becoming malformed, with some leaves failing to develop...