RelayCommand disables the button

Creating a dynamic buttons in code behind makes the button disabled when the RelayCommand is used.
Here is a example

var removeButton = new Button()
{
Content = "X",
Command = new RelayCommand(RemoveEntry),
CommandParameter = index,
};
then afterwards adding this button to a StackPanel the property isEnabled is always false (no matter how it's bound).

There is a workaround solution make it work
First object initialize the button with IsEnabled =true, without setting the command

var removeButton = new Button()
{
Content = "X",
IsEnabled = true,
CommandParameter = index,
};

afterwards just set the command

removeButton.Command = new RelayCommand(RemoveEntry);