2017.3.0f1 RectTransform is not updated if object is not active?

My UI build perfectly in 2017.2.x.

Below a code sample from a loop making a list of buttons :

Code (csharp):

1.  
2.                     GameObject go = Instantiate (goBtnTemplate) as GameObject;
3.                     go.name = "btn_Tool-" + tool;
4.                     RectTransform rect = go.GetComponent<RectTransform> ();
5.                     rect.SetParent (goRootTools.transform);
6.                     rect.localScale = Vector3.one;
7.                     rect.localPosition = new Vector3 (i * width, 0, 0);
8.  
9.                     go.SetActive (true);
10.  

Every other UI also made dynamically doesn't update the position of any RectTransform.

I doesn't work in 2017.3, the edition of the rect.localPosition and rect.position has no effect at all.

The code has been writing since last September then no problem at all from every single Unity version before 2017.3.

Does anyone experienced similar issue?
Any tips? fix?

Thank you!

 

I had pretty much the same issue but i was setting localPosition. I changed it from localPosition to anchoredPosition and it worked as it did before.

 

even uglier.
looks very much the same with this one: https://forum.unity.com/threads/2017-1f3-p2-possible-bug-moving-inactive-recttransform.486149

 

@Wentz
anchoredPosition3D is working a charm!
Thank you so much!