How can I fix Caps Lock and @ issues on Magic Keyboard?

I recently bought this Magic Keyboard for my iPad Air 11 inch , and , when I first got it , the caps button didn’t worked. After I came in this page , i could fix it. Right now , my at and my caps lock does not work . Also , when I try to use them , all my screen turns blue. When it turns blue I have to take out my iPad from the keyboard and put it again .

I tried everything for the caps lock and nothing .

Does anyone know how to fix it?

[Re-Titled by Moderator]

Original Title: MY caps lock and my @ (at) it’s not working