Why my prefab's Scale is changed to 0 at runtime?

Is it an animated model? Are the animations separate model files? If so is their import scale match the main model's import scale? Disable the animation component if there is one to test it in runtime.

Also ins$$anonymous$$d of creating a new vector for position 0 you can always use Vector3.zero in your Instantiate call.

And my position is reset to left top corner of the screen and shown the same information in Inspector as well, despite I have the Vector3 set to where it should be and the DebugLog showed the correct position. See my modified code:

 Vector3 posGirlBody = new Vector3 ( widthOffsetForRatio + xOffset, heightOffsetForRatio + yOffset, 0);
             Debug.Log ("Girls's Position is"+posGirlBody);
             GameObject girlBody = Instantiate (girlPrefabs [Random.Range (0, girlPrefabs.Length)], posGirlBody, Quaternion.identity) as GameObject;
             girlBody.transform.position = posGirlBody;
     
             var crtScale = girlBody.transform.localScale;
             Debug.Log ("Current Scale is: "+crtScale);
             girlBody.transform.parent = transform;

The Debug Log shows: Girls's Position is(120.0, -475.0, 0.0) Current Scale is: (1.0, 1.0, 1.0)

Weird problem! :-( Never had this before. I wrote the same way as I did in my previous project which worked, but this time they don't work.