They don't really seem to have any big issue. Maybe a little too much N? There are some very dark fan leaves. And your girl should be in the process of removing N from her diet... 1.8 is a pretty high EC for an auto, I believe. It's borderline for a photo at that stage and autos use about 1/3 less nutrients in general. Water to runoff and check the EC. If it's 2.0 or less, you're probably not in bad shape.
Almost anything can cause drooping honestly. Low temps, humidity problems, nutes, over AND under watering, or even just the time of day (some plants will start drooping an hour or two before lights out).