esp8266-weather-station-color: Icons from OpenWeatherMapForecast always the same

[friedpa]

I am running ThingPulse esp8266-weather-station-color [Wifi-color-display-kit] and the esp32-weather-station-touch. [thingpulse-color-kit-grande] The Icons displayed from OpenWeatherMapCurrent are the same on both systems, but the Icons from OpenWeatherMapForecast are different (both systems are using the same API, Location ID and Location City). For me the Icons from OpenWeatherMapForecast displayed at the esp8266 System are wrong.
Any suggestion how to fix?