I first noticed this on the preview image, where each of the characters looks a different weight except ! and $. After installing the font, # looks fine, but @ stays thin for thicker weights which looks out of place to me. It is a more complex character to do thick and small, but I've seen some very good takes on that from other fonts, often by losing the hole in the center a.
This intentional. It's a point of differentiation. It allows the @ (and a few others characters in teh set) to stand out within surrounding characters.
I first noticed this on the preview image, where each of the characters looks a different weight except ! and $. After installing the font, # looks fine, but @ stays thin for thicker weights which looks out of place to me. It is a more complex character to do thick and small, but I've seen some very good takes on that from other fonts, often by losing the hole in the center a.