I have an fbx import that produces the following geo
The freshly created TDImportCache/panels_combined.tdc and the toe have been pushed to this repo GitHub - AchimKern/td-fbx-issue
If i reopen my local project, it opens as expected.
But if you clone the repo and open the toe the displayed geometry is only a subset of the geometry
You need to reimport the fbx after the initial clone