Get position of RectTransform in layout group

I have a canvas set to screen space overlay with a responsive layout using layout groups. Im trying to apply a tween to move the element 100 pixels from its current location. In the past with UI elements not in layout groups if I wanted to say move the current RectTransform 100px from its current position using DOTween I could just reference the current transform like

Code (CSharp):

1. RectTransform.DOAnchorPosY(transform.position.y + 100, 0.5f);

Seems I can't reference the transform.position on a RectTransform if it is a layout group because of the anchoring driven by its parent with the layout group. How can I get the RectTransform current position when it's in a layout group?

 

I have exactly the same problem. If my UI is directly under Canvas,
myUI.GetComponent<RectTransform>().TransformPoint(myUI.GetComponent<RectTransform>().rect.center);
...works well. Or myUI.GetComponent<RectTransform>().position


Update:
I found it. see this thread :

https://forum.unity.com/threads/sol...ight-of-an-element-when-using-layouts.377953/

for me,
Canvas.ForceUpdateCanvases();
worked.