To reproduce:
1. Open the attached project
2. Observe that "Awake", "Start", "Update" is displayed in the console (because of the ExecuteInEditMode script)
3. Reimport the script to trigger recompile
4. Move the camera around
5. Notice that "Update" is called without any calls to "Awake" and "Start"

Note:
Awake and Start are not called on the object because they were already called on this object upon its first creation. On load, the object state is serialized (public and private variables) and then deserialized. When deserialization happens, as long as the object already existed, Awake nor Start are not invoked.

This is by design, and it's tightly coupled in the MonoBehaviour lifecycle. Changing this behavior will possibly impact on all the projects that don't expect Awake/Start to be invoked.