Yeah, it's for sure not spider mites. I had those a few years ago and lost 1/2 the harvest to those little fuckers.
I've inspected very close for worms and caterpillars and haven't found any. Possibly moths? Or some kind of fungus.
I sprayed her down with some organic pest/fungus stuff. We'll see.
The fan leaves are prematurely yellowing too. (see pics)
But all the new growth looks healthy. About 1 week into flower.
The plant growing right next to her is twice as big and healthy as can be. Got me befuddled.