Finally, BioBizz had arrived. Added 2 ml/l and couple days later the yellowing stopped, the growth continued and preflowers started to show up. Forgot to take a picture.
Also replanted her to a small pot to avoid wasting space, since I figured she wouldn't get much larger anymore.
@DEVS_GENETICS, she smells amazing! Really sweet and citrusy.
I have another Tangie Auto growing in the same tent (growdiaries.com/diaries/118961-grow-journal-by-voidvine) from the same seed pack, but she smells differently, more like pungent and skunk, citrus is less noticeable. I wonder if that's because this one was stunted, or just different phenotypes.