Very difficult to tell from the pics, and I know it's hard to get good ones. Maybe try a video?

Can you take pictures under normal lighting?

There are many factors that come into play. If you're growing a photoperiod plant, vegging for a minimum of 4 weeks is a general practice. Some strains require 3 weeks and you can veg for as long as you want in a controlled environment. The longer you veg, the larger the stretch will be in flower. Flowering will vary from strain to strain. The best way to know is by checking the breeder's recommendation on their website if you ordered online. Flowering can take anywhere from 6 weeks to 12 weeks.

My recent auto did exactly this, but at week 1 of flower. It spider legged and went everywhere. Was a pain in the ass to control.

Only other thing I could think is being underwatered.

Since you've already been doing cal-mag, my guess is it's from the fan.

What lights are you using and how far away are they? Do you have a fan or heater blowing near this plant? What's your PH in/out and PPM? Or is it too early for PPM? Have you been doing any top dressing yet? And what medium are you using? Is that coco?

Tying it down or super-cropping will work

Rosemary oil for the leaves, or another oil you're comfortable with. Until the predators arrive, you could bring a vacuum in and try to suck them off the bud or get a fan(s) blowing heavily so they can't make a home and kick them them to the curb.

What lights are you using and how far away are they? Do you have a fan or heater blowing near this plant? What's your PH in/out and PPM? Have you been feeding? If so, what have you been using and how often? What medium are you growing in? Soil? Which kind? What's your temp and RH?

If you see shadows below, then the bud below wont be getting light. If you don't want to stress them out too much you could always leaf tuck. All personal preference.

Fair enough. I reached out to Photosyntech. There's so much contradictory information on the subject.

Yessir!

I would angle your fan more so it's not blowing on them directly, or rebounding off something and hitting the sprouts. They're leaning like they're being blown over. Are they photo's or auto's? If photo's I wouldn't transplant too early. Without an established root zone they could fail.

@Dustsheep What about making a lung room just outside the tent? You could do it with a smaller tent or a large wardrobe box even. Throw the humidifier in there and run the fan in the tent. If needed, you could keep a bowl or bucket of ice in the lung room and pull cool air through.

The blurple makes it difficult. Are you able to take a picture under normal lighting? What lights are you using and how far from the canopy are they?

@Dustsheep You could balance the temp in the room that your tent is sitting in. Might be easier and cheaper than throwing a heater in the tent. Keep an eye on the leaves. If it starts getting worse, you may want to start adding some cal-mag at 1/4 dose or less. I've noticed FFOF goes through it around days 20-25 and deficiencies start popping up slowly.

How often are you watering/feeding? 7 degree temp fluctuation is pretty significant in a 4x4.

That's a beauty! Looks like you're starting to flower. You could do some defoliation and lollipopping if you wanted, but otherwise that's one full plant!

Can you grab a better picture of the leaves? I can't tell if the foliage below the trellis is shadows or an issue. What's you PH in/out and what's your PPM? How often are you feeding/watering and what's your medium? What lights are you using and how far are they from the canopy?