Yeah, I hear this. Reading fiction was difficult for me because it was hard to distinguish and keep track of characters. I would find myself voicing the same voice for all the people in the story.

It's important to keep track of characters when your final grade depends on it. Dialog was a bit difficult too because it was easy to lose track of who was speaking. What's interesting is that I remember enjoying reading when I was young. But that changed around 10 years I think.