LRGB is not working in RGB Combine

When I use the RGB Combine tool, for LRGB its treats L as a white layer of 4 layers, forcing the result to white.  This is not correct.  L is the intensity to which you take the RGB intensity, ... you compute the amount R contributes (say 23%) to a particular pixel, then multiply that times the L amount to get the new intensity for R, etc.  Each color is painted onto L proportionately.   The results should not be White but boosted colors, based on their proportion to each other multiplied by the Luminance level, give it an even strong intensity than it would have had without the L. Its completely not working as is, since its treating a 4 (LRGB) as equal layers.    For example let's say your Luminance is 200 for pixel, and you compute the RGB (based on RGB not LRGB) percentages for that pixel based on your data, let say that comes 37%/44%/19%  (you throw away the old RGB intensity from the individual files and replace it with the intensity you compute here), so then you would end up with 200x.37 = 74 RED, 200x .44 = 88 GREEN, and 200 x .19 = 38 BLUE.   Instead you're just giving us white.    Its not about moving the slider down so white is not there revealing the color its about recomputing the intensity of each pixel based on L values as percentage of RGB, its a new intensity.  

For example, here is APP on the LEFT;   and ASIStudio on RIGHT  (same FITS files as input).  Yes I pushed recalc after selecting files on APP using LRGB formula.