Weird behavior, full brightness, then correcting?

I have a weird issue with FastLED and my WS2811 strips. When running the script below, as soon as I power on my Arduino it fades up the brightness. But the weird part it fades to full brightness, and then it corrects the brightness to the brightness I selected.

This happens however I set it up, if I remove the fade part it still happens. But the fade part confirmed to me that it is certainly a coding issue and not a hardware issue.

The video showing the issue is in the post below.

#include <FastLED.h> #define LED_PIN 16 #define NUM_LEDS 9

CRGB leds[NUM_LEDS];

void setup() { FastLED.addLeds<WS2811, LED_PIN, RGB>(leds, NUM_LEDS); FastLED.clear(); FastLED.show();

// FADE-UP

for (int b = 0; b <= 140; b++) {

FastLED.setBrightness(b);

// Set color

for (int i = 0; i < 5; i++) leds[i] = CRGB::White; leds[5] = CRGB::White; leds[5].nscale8(220); leds[6] = CRGB::White; leds[6].nscale8(210); leds[7] = CRGB::White; leds[7].nscale8(180); leds[8] = CRGB::White; leds[8].nscale8(130);

FastLED.show();

delay(5); // Fade speed

}

}

void loop() {

}