Board Thread:Character Discussion/@comment-34563899-20180329193002/@comment-25375217-20180329193541

Her Season 6 arc ends with her reabsorbing some of the evil to balance herself and the Serum Queen. In Season 7, she is said to have gone soft rather than anything about not being responsible for the Evil Queen's actions, and she willingly admits to Lucy that she is the Evil Queen. So I'd say it was actually a part of her character development which has since been resolved.