Soil looks dry Your over thinking this . Any chance thiers hydrophobic spots in tthose pots ? I would water from bottom a few times . Also why distilled water ? Start using half tap water, then 3/4 and then stop buying distilled water.
Lol this old topic ... still growing same dosidos, . I've since found this only happens when strains have too much light or heat . Or can be caused by a major difference in day ie 85 and night ie55 Temps . Basically its because of stress like situations noob growers put thier plants in
It's really hard to get a professional yeild busting scrog that you see with separate pots and different cultivars .
Unless you run the same cultivar Or veg 1 monster plant ya kinda just winging it .
I usually over veg and I avoid any stripping until stretch/bud set is done. But once its all...
The answers to your problems were written on the pages i speak plant this is what they said.
your night temps dropped you said 60 but i know those root bound plastic buckets were on the cold ass floor . Then you stopped feeding/"started flushing" so the cold ass roots with a 5/10 metabolizm...