System Information
Operating system: Win 10
Graphics card: 1080 Ti
Blender Version
Broken:
2.80 957b4547aeeb
Worked:
2.79b or master
Short description of error
So whenever you enter edit-mode for dupli-face objects(the main one, not the children), the objects on duplifaces disappear. In 2.79 they were drawn on duplifaces even in edit mode (which is imho a better behavior cos you can see what's happening)
Exact steps for others to reproduce the error
Add any object to the scene, add a plane, add an array modifier to that plane, parent the plane to the object and switch dupliface instancing on. Enter edit mode on plane and the instances arent drawn in the viewport