My enemy doesn't appear when I restart Unity

Unity Engine
1

Hi,

I have a problem that I don’t know how resolve it, I have some enemies in my prefabs folder, and when I put some of this enemies into my scene, this works very well, save my scene and project, here comes my problem, when I restart Unity my enemies appear into my scene but when I push Play button, my enemies disappear and move to infinity and beyond, and I don’t know how fix it :(.

Here I have two videos explain my problem.

https://drive.google.com/file/d/0BwPoBfeJZcA4NVhaaFd4YmZDa1E/view?usp=sharing
(This video is when I create a prefab from the enemy and works well)

https://drive.google.com/file/d/0BwPoBfeJZcA4RVNpcUg4ci01d2s/view?usp=sharing
(This video is when I reset my Unity and my enemy does not appear on Game and not to do)

2

I guess at first you need to check whether the enemy prefabs are still there in the inspector. Secondly if the enemy prefab is there in the inspector than you need to check at what position those are added.