I lost my Theo Hernandez

Hello, I have encountered a bug since the new update of the mobile app. While doing a DCE of Matthaüs (Squad 87), I realized that my player Theo Hernandez (87) was on the team. Not wanting to lose him, I replaced him with another player, and I put Hernandez in "Work Area". By submitting the team, I lost my player T. Hernandez. Normally, players in "Work Area" should not disappear. I want to get it back please.

Thank you.