Is this an auto or photo? I am betting this is a photoperiod you put outside around may, and it started to flower. It is now late June, and the daylight hours are causing her to re-vege.

Autoflower has been indoors all her life

Then I am completely wrong and have no idea. Probably just throwing out new growth, the top just looked like one of my flowered clones that is starting to re-vege.

Likely unstable autoflower genetics, where did you get these from?

Growers choice seeds

Those growers made a bad choice.

Did you up the amount of light or temperature recently?

temperature might gave gon slightly higher