Most likely, - you have a mismatch of either or both of these:
1) Always place views layouts on the Archicad layer (always on). To check this open layout,
right click on the offending placed view, with it highlighted look at the info box and take note of the layer it is on. Change if necessary.
2) While the layout drawing is still selected: Right click again, select "Modify Source View Settings",
make sure the layer combo is what you think it should be. Sometimes we muck about before placing
the view to layout and wind up saving with the wrong layer combo.
The workflow is Project Map -> View Map -> Layout -> Publisher. Each one
builds on the last. (You didn't ask, but it's all related).
Oversimplified but helpful to think of it this way.
The project map is composed of floor plans, elevations, etc.
The view map is phenomenally powerful VIEW of those PROJECT floor plans.
The layout is the "paper" that the VIEWS are placed on.
The publisher is a one click "print/plot that stack of layouts".
PS We all double check our work only to discover it requires a triple check.