unit action ignoring suspending in inGameUISetEventHandler

[dArquien 0]

I'm creating a script that makes the door of the vehicle open when someone tries to get in.

inGameUISetEventHandler [
    "Action", 
    "
        if ((_this select 3) == 'GetOut') then {
            [] spawn {
                _player = player;
                _target = (vehicle player);

                _target animate ['Door_1_1', 1];
                uiSleep 1;
                _player action ['GetOut', _target];
                uiSleep 1;
                _target animate ['Door_1_1', 0];
            };
        true; 
        };
        if ((_this select 3) == 'GetInDriver') then { 
            [] spawn {
                _player = player;
                _target = cursorObject;

                _target animate ['Door_1_1', 1];
                uiSleep 1;
                _player action ['GetInDriver', _target];
                uiSleep 1;
                (vehicle player) animate ['Door_1_1', 0];
            };
        true; 
        };
    "
];

While GetInDriver action is working as intended (the door opens, player gets in, the door closes), GetOut action, more specifically:

_player action ['GetOut', _target];

Ignores uiSleep and plays just as the action is pressed. I'm struggling to understand why this is happening. I'd be glad if someone helped me out.

Thanks.