I’ve had it happen under indoor conditions a couple of times too. I’m curious what your longitude is and how many hours of daylight you’re getting? As for the nutrients I’d cut back a touch on the nitrogen and come up on the phosphorus just a little until you’re absolutely certain she’s not going to re-veg. Once that happens I’d pour the coals to her. It’ll actually be nice not having to trim both of those monsters at the same time. They look great!