All such recommendations are general, strain specifics and other conditions can play their roles too for light blasting tolerance,... If the problem is appearing mostly on the tops, that's a tell right there, along with the mild distortions of the leaves,....
VPD is borderline, and combined with potentially too strong lighting, it can trigger such symptoms.... hiccups like you had can tip things over the edge too,... P and Fe are really badly affected by cool T's....
pH is OK, on the high end of optimal range,.... SoHum is right about occasional light supplementing with nutes, especially during bloom,... KIS, Biotabs, KindSoil say similar things,.... I had to feed extra with both KindSoil and Biotabs, the plants simply used some things up by blooming!
Let's see if the feeds help,....
