yan402answered grow question 25d ago It's most likely something nocturnal like a caterpillar or beetle. Since it's only hitting top leaves and your sticky traps are clean, I'd lean toward something crawling or hiding during lights-on.
Check at night with a flashlight, and look under leaves or even in the topsoil. If you find anything, remove it manually or treat with neem or BT (Bacillus thuringiensis) if you're in flower-safe range.