His form is very hot/cold/hot/cold.
He started the year somewhat cold. Scored a goal in the first match then his chemistry with his teammates wasn't very good on the break and it led to him being out of position very regularly. Fast-forward to Cesena, and he had a great match, scored and assisted and from then on the team's tactics shifted a bit and he became the key on the break as he led the line from that point on. He scored 10 in the next 14 matches with 5 assists in that time. The last match of this streak, Verona, he scored on a great freekick but other than that his game was very lacking going forward.
That was March 22nd. Since then, he has scored twice in 12 matches with 4 assists. He has been somewhat slowed by his team's form falling a bit but overall his has been slightly exposed by opposing teams in this second round of fixtures. Whereas the first fixture of the year against Palermo, he wasn't isolated or man-marked to any degree, this second half of the season he has been under increased pressure and has become the focal point of opposing defenses. And in that time where he has been isolated on attack and marked, he hasn't showed much. In particular, against Chievo and Cesena, he has been particularly wasteful in possession and has actually been the cause of several Palermo attacks and counters to die out.