Demo of NeoPixel library not working as expected

neopixel_brightness_test_not_working.ino

// example sketch to demonstrate percieved neopixel library error.
// expect green > off(-ish) > blue > off > red > off > green > off(-ish) > blue > off > red
// get    green > off(-ish) > blue > off > red > off > off   > off       > blue > off > red


#include <Adafruit_NeoPixel.h>

#define PIN 0
Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_RGB + NEO_KHZ800);

void setup() {
  pinMode(PIN, OUTPUT);
  strip.begin();
  strip.setPixelColor(0, strip.Color(255,0,0));
  strip.show();
}

void loop() {
  uint16_t wait = 2000;
  strip.setPixelColor(0, strip.Color(0,255,0)); // green
  strip.setBrightness(255);
  strip.show();
  delay(wait);
  // setting brightness to 1 is OK but pixel not 100% off
  strip.setBrightness(1);
  strip.show();
  delay(wait);

  strip.setPixelColor(0, strip.Color(0,0,255)); // blue
  strip.setBrightness(255);
  strip.show();
  delay(wait);
  // setting color to 'black' is ok...
  strip.setPixelColor(0, strip.Color(0,0,0));
  strip.show();
  delay(wait);

  strip.setPixelColor(0, strip.Color(255,0,0)); // red
  strip.setBrightness(255);
  strip.show();
  delay(wait);
  // but setting brightness to 0 kills strip
  strip.setBrightness(0);
  strip.show();
  delay(wait);
  // and we never get back brightness until we set pixel color
}