I have seen this trend on Indian dramas where innocence is reflected by childish antics and immaturity. A 25 year old woman acting like a 4 year old is not revolutionary and fresh for me, unless the motif is a mental disorder, which was my first impression of Noor.
The way Noor mocked/rejected Khalid because he is a differently abled man was where they crossed the line of innocence for me at least, the narration and reaction of other characters in this scene tells us that Noor is a muhfat, she doesn't hide anything in her heart. Is an Innocent good hearted person capable of dissing someone who can't walk or talk properly, this man is already depressed with patents like Asgar and chachi.
Khalid's actions of forcing himself on Noor. Noor and Shaira punishing him for it.
Noor is not a mentally unstable character but Khalid is a mentally unstable character. Khalid has no understanding of human boundary and it is comprehensive given his character sketch, he got punishment too because none should get away with what he did to Noor.
Two characters and two situations, where Khalid's actions are something one expects of a mentally unstable person, yet he was punished but Noor's insensitivity was presented as her innocence.
Makers should be careful in this regard, now and in future, I like Noor but show her wrong as wrong, do not sugarcoat it with destiny or nonexistent innocence.