Karchaoui FUT Birthday - Stamina issue

Card has 98 stamina but within the first few minutes of a second half her stamina bar is below half and in the yellow. Not using team press and other players are not suffering from this issue. She doesn't have relentless playstyle but neither do some of the other players I'm trying who are not dropping as much stamina e.g. Kovacic (FoF: Answer the Call). Is there a problem with this card or is it just how I'm using it (CM: Box to Box and CAM: Playmaker)?