PShape.setFill() no longer works

Created by: cacheflowe

This used to work in Processing 3.x, but no longer works in recent Processing 4 versions.

Here's a complete sketch. In Processing 3.x and up to 4.0.b2, we see the box updates to random vertex colors. Since Processing 4.0.b4 (or maybe beta 3), it doesn't have an effect.

PShape shape;
  
public void setup() {
  size(640, 360, P3D);
  shape = createShape(BOX, 100, 100, 100).getTessellation();
  updateFill();
}

public void updateFill() {
  int numVerts = shape.getVertexCount();
  for (int i = 0; i < numVerts; i++) {
    shape.setFill(i, color(random(255), random(255), random(255)));
  }
}

public void draw() {
  background(0);
  translate(width/2, height/2, 0);
  rotateY(frameCount * 0.01);
  shape(shape);
}