Corner tactics still not working properly

I mean, it has gone 1 month of the game and this issue is still unresolved.

Every time you try to choose which players stand where on a corner, both offensively and defensively it doesn’t let you change.

I try to change this all the time, but it wont work. Its really annoying when my 170 midfielder is the target forward on a offensive corner, or the 170 midfielder is marking my opponents target player.

I do not understand how such a small issue is still unresolved 1 month into the game.