Hello again!
When I press the "osx fullscreen" button (in the top right corner of my finder window) my lwjgl window enters this "osx fullscreen button" fullscreen mode. In this mode if I enter an lwjgl fullscreen mode and after it entered the lwjgl fullscreen mode I disable the lwjgl fullscreen mode (I switch back to an lwjgl windowed mode), after all this if I resize the window lwjgl does not report that a resize has happened.