I've found something very strange in Delphi 10.1 Firemonkey.

```
procedure TForm1.Button1Click(Sender: TObject);
begin
  Button1.Free;
end;

```

After this - when I clicked on this button, the form's system icons aren't working! It returns to work only when pressed another button or switched to another window and back again.
Why?
I'm confused...