Group master flash problem

Hello!
Recently I noticed that using group masters for Generic RGBW fixtures has strange issues.

First - group master flash:
3 groups of RGBW fixtures, created 3 group masters for them, set flash to 100%, but only one flash button worked - other 2 were acting like flash is set to 0% - it was taking group intensity to 0%. After console restart none of 3 group master flash buttons were working as supposed. To test this further I created master for VL2500 but it seamed to work fine - maybe this is related to fixture type (Generic - RGBW).

Second - intensity fade:
I had few scenes with RGBW fixtures set to static levels using intensity (I Red, I Green, I Blue instead of using Color and Intensity). Now If group master is at 100%, fades between those scenes were smooth, but if I reduced group master intensity, fade started with rapid change of intensity to some level and only then fading from that level.

Console - HOG3 running 3.1.8 or 3.1.9 (will check version tomorrow), with playback wing
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