UI image weird, if i change its position

Hello! Im trying to make a minimap with a new UI. Everything is working, exept one thing:
when it moves it scale a little bit and returns. Its hapenning when an object is moving:

imageUI.GetComponent<Image>().rectTransform.anchoredPosition3D = new Vector3(transform.position.x / 2.5f, transform.position.z / 2.5f, 0);

Actual scale isnt changing.How can i fix this display bug?

Fixed by using textures with tranparent borders(billinear and trillinear dont have this problem)