A number of birth dates are incorrect
https://www.transfermarkt.com/connor-dimaio/profil/spieler/264196 Connor Dimaio Jan 28, 1996
https://www.transfermarkt.com/jordan-downing/profil/spieler/636870 Jordan Downing Feb 2, 1998
https://www.transfermarkt.com/elliot-osborne/profil/spieler/466673 Elliot Osborne May 12, 1996
https://www.transfermarkt.com/festus-arthur/profil/spieler/694830 Festus Arthur Feb 27, 2001
These are small changes for most of the players but in Arthur's case, he is actually 2 years younger than his FM age (DOB in game is 26 Feb 1999). Arthur is also a starting player at just 18 (double figures for appearances this season), while Downing, who is rarely involved at senior level and is 20, currently is rated as having greater potential than Arthur, which seems wrong.
In fact he won the County Player of the Month award for September 2019.
I would say that Arthur's current ability and potential both need to be improved to reflect that he is a starter in this team.