ADDED: Scroll down to see a video of this issue in action
I have a number of booms in my plot. These are shown on my lighting plot layer with viewports created by the Create Plot and Model Views tool. I have the definition and model layers for all of the booms hidden. This setup correctly shows the boom in plan view with instrument symbols. When I pan around the document however (holding down [Space] and dragging with the mouse), the viewports boom viewports all suddenly show the 3D model of their respective booms, including the full width of the pipe and the 3D mesh for the instrument model. If I change the visibility of any non-active layer, the viewports pop back to the (correct) plan view, even if the layer whose visibility I changed has nothing to do with booms (such as my softgoods layer). Toggling the active layer's visibility does not fix the rendering. I assume that this is a bug of some form? If not, what am I doing to cause this behaviour?
Edit:
I can cause a similar behaviour as well: If I edit the definition layer for one of the booms, then hit the Previous View button to go back, all my default layers get shown (such as lighting, softgoods, venue, notes), however only the selected layer (lighting) is shown on screen. If I toggle the visibility of any other layer, all of the missing layers snap back into being shown.