Not sure - Infestation of some kind. Crush a spot with your fingers Push hard on both sides & wait a day. I would remove each leaf but 1 at a time. Mites maybe or another critter. Leaf removal shouldn’t hurt the plant. Keep close watch for spread. I crush any sign of insect eggs - works for me...
Looks like BURN of some kind - best guess. I would cut off any leaf with symptoms and then check & make sure leaf isn't too close to heat or light. A heavy flush & then water only No Nutes then see what happens. If it's an Auto they are very TOUCHY when it comes to too much of anything Always...
I'm a severe acute chronic pain patient that has used Opiates for pain dating back to 1993 - my dose increased in or around 2008 after my 10th operation and removal of a spinal cord stimulator. Last month I was told a Pain Pump could not be implanted due to the severe damage to the spinal cord...