Intuition in Kant is not just sense perception but also has a component of knowledge that that component of knowledge has to have already  a prior organization [being in space and time] (in order to be able to be processed by the mind.)

(if all it is is sense perception then how can it have anything to do with the mind? It is like apples and oranges.) [Critique of Pure Reason A-99. page 300]

[Another problem is unity of consciousness is what makes the unity of the Universe. But there are many consciousnesses [You must have noticed that there are lots of people around.] So I think you have to come to the answer of Fries that there is a deeper kind of knowledge [non intuitive immediate] that i the knowledge of things in themselves.[This gets rid of the problem that if all we have access to are representations then what are they representations of?]

This is probably the most troublesome aspect in all of Kant and for that reason it makes sense to hold like Fries that there is a sort of knowledge that is non intuitive and not by reason in order for there to be any possibility of the mind processing any kind of sensory input.