FastLED Flickering

[IS512]

Flickering issue when writing slots to FastLED LEDs, Works fine with this library https://github.com/luksal/ESP32-DMX-RX haven't had a chance to narrow it down to anything specific with the LXESP32DMX library

  for ( int i = 0; i < NUM_LEDS; i++) {
   
    leds[i].setRGB( ESP32DMX.getSlot((i * 3) + 1) , ESP32DMX.getSlot((i * 3 + 1) + 1) , ESP32DMX.getSlot((i * 3 + 2) + 1) );
  }

  FastLED.show();