Hello,
This player's starting position is AM, not ST.
Proof: https://www.transfermarkt.com/bogomil-bozhurkin/profil/spieler/891693 https://www.transfermarkt.com/bogomil-bozhurkin/leistungsdaten/spieler/891693
The other positions he plays are CM and DM.
I also think his potential could be raised a bit. In this season he is a starter in his team and is one of the most consistent players.