Top and Bottom Camera views display nothing

You can use the camera tool (c) to move around in all views. It's easy to move a top view so that included layers are not in the view. If you pull way back on the top view, do you see any layers? What happens when you reset the views (right-click in the view)? None of your screenshots show the position property of the selected layer so we have no way of telling where it is or even what it is.

What happens if you create a new comp, add a comp-sized white layer, make the layer 3D, and then select multiple views? 

Thanks for the screenshots, @mjv-video.

I'm a little unclear on what's still missing. In your screenshot of the 4 Views, it does seem like the Top view is missing content, but it's a little difficult to discern with this scene as whether anything should be rendered.

One thing: the Show Layer Controls option can be changed per-viewer, and it looks like maybe that's off for the Top view. If you click into that view and then choose View > Show Layer Controls, do you at least get the 3D gizmo and other layer controls?

Could you share the project file with us so we could try to replicate the problem? You can DM it to myself and/or @jenkmeister17177426 if you don't want to share it publicly.

Last screen shot attached is selecting "4 views", where 3 of the 4 views show elements-- but top/bottom views still will not.  I also noticed that when I put the top view on the left side of a 2 view mode-- it "will" show elements.  However right side of a 2 view mode does not ever show scene elements-- very odd.  And left/right/top/bottom will not show any scene elements when in a single view mode.

corrected upload for "active and top"

Sure-- see the basic examples attached.  In "active and top", it shows the empty view on the right side (top view).  It is the same as with bottom.  In "left only", it shows that left (right does the same) does not display elements like camera on the screen when it is the only view selected-- as opposed to having two or four.  Thoughts?view mode.