First-Ever Indoor Autoflower Grow

May 28th: Fed all of the plants this morning. May 31st: All of the plants are showing signs of light burn so I moved the lights up so that they are all at least 24" from the plant canopies. I can always take the ViparSpectra light out of the tent if it becomes an issue since the MarsHydro light says it can cover my 4'x4' space in bloom. There is also some yellowing/rusting of the sides and veins of some of the upper leaves surrounding the main colas on both the Industrial Plant Autoflowering CBD and the Ripley's OG. The plants were thirsty this morning so I just gave them all a nice drink with water PH'ed to 6.5 and let it run off to about 15% just to be safe. All of the plants are on Day 38 (except for Industrial Plant Autoflowering CBD who is on Day 39). June 1st: Turns out being lazy and not taking the time to PH my runoff water this whole time came back to bite me in the ass a little bit -- lesson learned! I tested it on a whim this evening and it was 7.0. From the advice I got online (here and r/autoflowers) and in person (my local hydro store owner is a really smart old head), it seems like there is enough nutrient lock-out going on that I should be concerned. I was told to give it another feed with some increased strength on my nutrients (from 1/4 to 1/2 strength) + full feed of Cal/Mag + PH the water down to 5.8-6.0. I did that this evening and I'll take some pics/videos tomorrow or Saturday for an update and to give a better idea of what the problems look like. June 4th: Raising the lights so that they are both 24+ inches away and flushing with PH'ed nutrient water at increased dosages seems to have done the trick. Both the Industrial Plant and Ripley's OG still show some signs of deficiency/lockout from the PH issue. It's something I'll keep an eye on. I have noticed an odd thing with the Seedsman White Widow Auto... when I check on her in the morning she looks plenty healthy and is stretching -- but when I check in the afternoon or evening, she's always drooping. The medium is still nice and damp less than a knuckle down. What could be causing this?