I usually brew V60 at home with recently roasted beans that I grind right before brewing my coffee. I like fruity notes in my coffee, and what I noticed is that the first cup I make after opening the package is usually the most aromatic.
This doesn't surprise me much because I can understand that the most volatile aromatics might be dissipating quickly after I open the bag. But what I noticed is that if I keep the bag closed for a while (a week or two) the coffee again tastes better when I brew it compared to the consecutive brews.
Why would that be the case?