I’ve had leaves curl before, but never as much as this.
What is your rh?
And welcome to the community btw!!!
Freezing roots???
Temps don’t seem to be the problem. Possibly overwatering or do you have a fan blowing directly on the leaves that are folding over?? 
I’m sure it’s not overwatering - I’m very careful about that. The fan doesn’t blow directly on the plant, it blows over it just to keep the air moving. I’ll give it a couple of days and probably just feed it with pH balanced water at the weekend. Hopefully it’ll perk up a bit. Cheers.
Has to be 24° Celsius. That’s 75° to the rest of us or maybe only us. I think mostly everywhere outside the USA uses the metric system and Celsius.
Copy and paste of the most common reasons your leaves would curl:
Had to ask the question… I didn’t know. Just seemed awful cold!!! 
It throws me off every time I see temperature in Celsius. I have to convert it over online or I have no idea what it means. Can’t imagine saying hey it’s 24° today, let’s go outside and do something…
This curling happens to me when I water from up top, and drip nutrients on leaves. Which I just did an hour ago in lights out cause of rushing… Maybe I’ll be back here in a couple of days with comparison photos for you to see 
One of your photos actually has a Water(ish) stain line in a few places…
Another curling incident I caused was roughness and crushing on fans by leaning and reaching
A steady 50 - 55.
I’m inclined to agree with @CLICKYBONES (sounds like me walking around when I first wake up). If this is the case, even drying immediately, you’ll probably still get blemishes or leaf curl.
Thanks for all the replies. I’ll check on her in the morning. I’m thinking it can’t be a coincidence that I use Big Bud for the first time and this happens.
From first pic above…
The red circled area is almost 100% some kind of drops.
Nutrient deficiency and excess is usually either in patterns along leaf edges or in the individual serrated areas that make up the leaf blades. Yours look more like a smudge. If it’s just a few leaves here and there, I wouldn’t worry, just maybe a little more caution when watering/feeding. Or possibly rh spikes during lights out and water drops are forming and dripping. But definitely keep an eye for it to progress and we’ll bust out the support ticket and square it away!
Thanks for the info. I’ll keep an eye on it.
Double the Celsius temp add 32 that gets you to Fahrenheit.
