I get that when blowing a fan on my plants too directly, too strongly. I think it's also related to my frequent 20-25% humidity. I spread a wet towel out, but I do ok without that. The key for me is not too windy conditions, that's what exacerbates the dry air.
However, I think I see some mg def occurring in the 2911 photo. Slightly pale between the veins. I would add 1/4 to 1/2 tsp/gal epsom salt next feeding.
I believe I have correlated Mg def with weird leaf behavior. I've seen then roll over and expose their underside before an Mg def became worse.
