A virus can also cause that. Last time that happened to me, at first the plant acted stunted compared to the others. It stopped getting taller, and the lower fans grew oddly gigantic and stubby super fat. It budded, but by cut down time all the leaves were gone. About one Oz, compared to the others at 4 OZ.That's my biggest fear being that this is my first grow, I pull mine and go round them every 2 days. I had some yellowing problems and ladies were dropping leaves and yellowing prematurely due to a nutrient deficiency. I was really worried about them herming.
How big are Nanners if they appear?
If it was a virus, the other tent mates did not catch it.
Bubba