Anyone encounter the issue with fullScreen(); not span across all monitor in Pde4?

I’m working on Pde 4 and my Macbook Pro is Catalina 10.15.7
I found that the basic SPAN tutorial does not work for me

int x = 0;

void setup() {
  fullScreen(P2D, SPAN);

void draw() {
  rect(x, height*0.2, 1, height*0.6); 
  x = x + 2;

I found that I need to delete P2D out and SPAN will work just fine. But in Pde 3.5.4 runs on the same Mac, it works well although threw a long red error but I get the animation as it should.

Any one know the why or if the Pde4 is not a good version yet?