Creo View Model Tree Won't Show Sub-Assemblies

I have an assembly opened in Creo View and all of the sub-assemblies show up fine in the structure tree. However, in the model tree it will only show the top-level assembly that I have open. I would like to select parts in the graphic window and have them highlight in the model tree, like how it works in Creo Parametric. 

I have tried reloading the branch links of the top-level assembly in the model tree, and the next level of sub-assemblies' link correctly, however as soon as I go to the structure tree and come back to the model tree, all of those links disappear. If anyone has any ideas how to fix this I would definitely appreciate it!