Cannot smell/taste certain things?

I've been on Buproprion XL for almost 3 weeks now and I now cannot smell or taste certain things. I had McDonalds the other day and could only mainly taste the burnt surface of the burger patty and the fries were almost completely smell-less and flavorless. When I eat certain things it's like I filter out some ingredients and only taste specific ones, making it taste funky overall. Has this happened to anyone else?