When I exported DWGs before section fill it would export without layer names. Now I have to run a Lisp routine on each exported DWG to kill the layers. I thought this was only a 2019 problem but its now in 2020. Is there a way to make it export on all layer zero? Or do I now need to make a feature request? If anyone wants the Lisp routine just ask or maybe I am the only one using my model as the source for my Autocad drawings?
Are you exporting 2D images or your 3D model? 3D models are always exported with the same tags (layers) as exist in your model. For 2D images you can select in the export options whether profile edges are exported to a separate layer or whether section cut edges are exported. Unless enabled, everything gets exported to layer 0.