I just noticed that when I printed out of Archicad and chose "all colors to black" that it did not turn my white fills black! Its funny how it takes a while to notice some of the new things introduced in new versions.
I ran into this a little while ago when I was printing old FlataCAD drawings with Plotmaker. Try setting your white pen one number away from pure white: 254,255,255.
David Collins
Win10 64bit Intel i7 6700 3.40 Ghz, 32 Gb RAM, GeForce RTX 3070 AC 27.0 (4001 INT FULL)