Top looking sad guérilla grow

I missed the part about lots of rain. I'd say it's roots, basically overwatering/pooled water because of the rain if you don't see clear damage (ants farming scales, aphids aren't gonna do that, I've had aints, scales, whatever a lot). That is, assuming, of course, it's not something like a stem borer (which is typically quite unlikely, but not impossible).

If theres ants thers aphids that they are farming. Something is sucking the life out of her. And the ants are helping. For outdoor a solution of some tobacco in water with some sharp peppers, some alcohol and a drop of soap. Spray it couple of time and spray the ants and aphids right off.

Tbh, coz I've seen what borers do, I would actually top that at the highest good looking node. And I don't say that lightly, hopefully it's not a borer, and some sort of transient internal hydrogen issue...but...I dunno.

Could also be a borer.

I had a sage plant that did basically the same thing. Check for pests cause ants love them, if theres quite a few ants on the plant they could be munching baddies.

Could be wind or heavy rain. Only problem when you go gorilla growing you can't move the plants out of bad weather.