Is it only possible to feel the notes when the coffee cools down?

I spent almost a year looking for the flavors described on the coffee packaging, I never felt anything, I had already stopped looking and thought that the notes was nonsense. But I always drank the coffee immediately after brewing it. So today I prepared the coffee and went to do other things, and it got cold when I drank it, I immediately felt a strong flavor of plum and orange, my palate is not at all sharp. I get shocked. Do the notes really only appear in cold coffee?