Brightness issue on Photon RGB

[IAIOMAN117]

Im using latest version as of 05/2020.

While using the Photon onboard RGB, and when setting the color it works fine, but if I change the brightness it affect the brightness and the color, if I select a predefined color, then it set is correctly, both the color ut to a predefined brightness.

It seems that there was a similar issue with LED strip, but this is still happening.