Reproduction steps:
1. Open the attached project.
2. Delete "ForceRefs" game object in the hierarchy.
- Bug is not reproducible if primitives exist in the scene.
3. Build and run for iOS.
4. Click on objects in the panel on the right side of the screen.
- Primitives will be spawned.
- Not that primitives doesn't collide( Pictures attached ).

Workaround:
- Skip step 2

Reproduced with:
- 5.3.6p6
- 5.4.1p3
- 5.5.0b6
- iPad Air 2 9.3.2