Fade color LPub3D error

[Jaco van der Molen]

I am building a big thing (that I cannot show) in tan on a green baseplate. I set the fade color to dark tan.
The thing is that it being a mono color model the fade color option is needed to clearify the new pieces.
However, the baseplate must remain green, because it is very ugly to see that in dark tan too in every next step after the first.
So I used a buffer exchange in every step that simply removes the baseplate and adds a new instance of the baseplate so it is not faded.

Then the fade color does something strange: the first new brick in line right after the STEP command is faded too.
Is this a know problem? Examples attached.