blurry snaps on snapchat

I have an Iphone 7. Every time I record a snap and save it on snapchat, it is crystal clear. Whenever I record or take a snap and post it on my story, all of a sudden it is blurry. I am not sure if anyone else has this problem but it is very annoying because when the snaps are recorded or saved they are so clear, but when I post them to my story they are blurry. Deleting and reinstalling the app does not help.. and neither does signing out and in again..