I did wonder about that...
She is either the Daughter or Clone of Wolverine, who had bone claws prior to them being coated in Adamantium, so might not the extending/retracting be part of her mutation? If it is, then it would be stopped, however if the mutation just gave her the mechanics of claws and everything else is pure muscle action, then not, I suppose...It would prevent her from healing the damage of the claws extending until she left Null's aura, but the wounds are so small that it shouldn't be an issue.
Like almost everything in the Marvel universe, it is probably just down to whoever is writing it at the current time and what they need to progress the story.