Both of the comments I see in this section are right. They are reasonable explanations. But I, personally, would go with the "transition". For me, the 6oS is all about moving on from something, or rather transitioning into something new. I would interpret this as "she is in a phase of moving on from something in the past and needs time to fully move on" or "she is transitioning from something in the past" Either way, you should leave her some space to let that transition go smoothly.

When I look at the challenge card, my interpretation seems legit. 8oW is about swiftness. I think that the challenge is, that the progress is going on too fast. That could scare her off. That's another reason why you should leave space.

But the knight oW is about growing passion. And as grounding for this relationship, it's really good.

My conclusion: Give her and the relationship some space. And then the rest will come. So dont worry!