I'm also having this issue
Any player that I ever took control over his individual training/position won't be touched by my staff again even if I "reset" the control in Staff Responsibilities > Training
Wish this could be fixed or at least add the option in the next FM like OP asked
Unable to Hand Over Individual Training to Staff
in Medical and Development Centre, Training and Finances
Posted
I'm also having this issue
Any player that I ever took control over his individual training/position won't be touched by my staff again even if I "reset" the control in Staff Responsibilities > Training
Wish this could be fixed or at least add the option in the next FM like OP asked
Thanks