Strangely aftertaste

My first choice was the Mocha, in which I thought it is a mocha variant (who knows how to write in Italy Mocha ?!). My first hot drink with the new Nescafe machine tasted for me but a bit disappointing. While creating a nice frothy milk, as it should be, but while drinking, I noticed a strange bitter (?) Connotation of irritated me. In addition, the Mocha taste more of cocoa and very little for coffee, and certainly not by Mocha. The taste is a little weak, so that my first impression was disappointing. Would it be a pure cocoa and would not be strange aftertaste, it would be a very good drink. So, however, I will refrain from now on this flavor once and for all and get me as cocoa drink rather the Chococino.
Fortunately my second hot drink macchiato was a bar - a complete success!