THE JUNGLE! Se esta cociendo Crema!

by the looks of it this is not from pests that I know of. Spider mites or thrips or aphids. I agree it could be from something dripping on the leaves or an issues with the roots. where they just transplanted? or fed? sometimes big changes in PH and EC can cause these type pf things to happen as well as transplanting and the roots get a bit damaged. My plants did something like this but it was overnight it happened. Give it some time and if its not progressing then nothing to worry about. if it is though. then you need to find out what causing it by examining your inputs and running some tests like runoff EC and PH as well as substrate EC and PH. doubt its light as that tends to affect the new growth more. Heat tends to warp the leases into tacos. Confirm your feed is providing everything the plant needs as well Micros and Macros. Good Luck!