It seems fine does’t it? Furniture and Drawer use Complex as Simple and the Rod has it’s on simple cylindrical collision primitive, so there must be a stray collision somewhere in there. I will do as you suggested, then I will import the mesh into Blender and see if I can find anything. If not I am out of ideas also.
The last thing I can try is create a whole new, level or project, start troubleshooting it on other levels.