FastLED and PWM on D1_MINI

Hi guys,

i am running ESPHome on an D1 MINI 4MB. I have FastLED on D1 (GPIO 5) and PWM on D2 (GPIO 4).

If i turn PWM (D2 / GPIO4) between 1 and 1024 i am not able to change the color on my WS2812B LED Stripe via FastLED.

When i change the color, the stripe is flickering and if i do not set the brightness to 100% i get random colors on my LED-Stripe.

I run 448 LEDs on that stripe.

It looks like the ESP8266 is not able to handle OneWire LED-Stripe and PWM at the same time? Or i am doing something wrong with my configuration / wiring?