Hey,
i didn’t find anything on github regarding this problem… I’m facing the same issue with my colorpicker in BasicUI its sending the correct data and the light changes the color properly, but the slider jumps to 50%. Reloading the site sets the slider to the correct position. Changing the color after reloading lets the slider jump to 50% again.
Im using Openhab 2.5 with basic-ui 2.5