Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.01
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-16 23:08, hash: rB12da679fa094
Short description of error
Low-poly edit cage for objects with deformation modifiers (curve, for example, which changes the location of the object) disappears if you move your view away from the deformed object.
Exact steps for others to reproduce the error
Load this sample file, enter edit mode on the cube and pan your view away from final mesh (when deformed mesh is out of your view, the edit cage disappears from the viewport). If you move the object in edit mode, it will come back once the final mesh is back in view.