Ah yes, the “issue” is the Costal Overlay macro, as it adds shadows to the bitmap. What you can do, is go into the macro (click on the Enter device button) and change the following:
Instead of having the selected wire (yellow in this case) go from the Chooser to the Combiner, we route it directly to the Chooser below, like so:
This will bypass the addition of shadows and create an “unbaked” bitmap output.