Ho Hum after more than 12 months...that's all a dash line?

Hi,
I have just downloaded the 2019 update, and am having problems with a bug that has been around for a while. As far as i can see this is still a problem.

What I would like to be able to do is overlay sketchup model scene views in layout and have the transparency be preserved so i can see the details of the lower viewport through the transparent features of the upper layer.

Can you confirm this is still a bug in 2019, or am i missing something about the way to do what seems to me a common visual communication technique