Line Renderer path animation issue

Question

I have a problem with rendering the Line Renderer. I have a coroutine that does a Fill with Line Renderer. Here Line Renderer makes an animation following a path. The function works well, but at curves Line Renderer does some nonsense.

1

2

3

    public IEnumerator DoFill()
{
    Debug.Log("Start fill!");
    _lineRenderer.positionCount = 1;
    _lineRenderer.transform.position = startPoint.transform.position;
    _lineRenderer.SetPosition(0, startPoint.transform.position);

    if (path != null && pipeRouteList.Count > 0)
    {
        for (int i = 0; i <pipeRouteList.Count; i++)
        {
            _lineRenderer.positionCount = _lineRenderer.positionCount + 1;
            int k = i + 1;
            PipeElement pipe = pipeRouteList[i];
            _lineRenderer.SetPosition(_lineRenderer.positionCount - 1, _lineRenderer.GetPosition(_lineRenderer.positionCount - 2));
            yield return DOTween.To(() => {
                return _lineRenderer.GetPosition(k);
            }, (x) => {
                _lineRenderer.SetPosition(k, x);
            }, pipe.activePipe.parentElement.transform.position, .5f).Play().SetEase(Ease.Linear).WaitForCompletion();
        }
    }
    yield return new WaitForEndOfFrame();
}

If anyone has any idea how I can fix it. Thank you in advance!