I know this sounds like a silly question, but are you using skin-on chicken, and not skinless? Sorry, I'm really not trying to poke fun, I just know many nowadays go straight for the boneless & skinless. Hope you get it figured out.
Pour buttermilk over the chicken thT you have placed in a bowl and be careful to coat each piece well then place in the fridge for 30 min or longer. Take out one piece at a time and roll in seasoned flour. Then into a skillet with hot oil or crisco.
Mainly make sure oil is hot enough. Start on high then, as soon as you put chicken in, turn down heat. Not too many pieces at once. I do buttermilk/egg wash then coat. Sometimes I double dip. Depends on my mood. Lol