lerp in coroutine doesn't work correctly

hi! can anyone say what is wrong in my code?? i call just the "showpanel" function out of this class. code work correctly in coming the panels into the screen but in hiding doesn't.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class UIPanel : MonoBehaviour {
 
     public GameObject Content;
     public PanelType typeofPanel;
 
     public static UIPanel activePanel;
     public static UIPanel hidingPanel;
     public static Dictionary<PanelType, UIPanel> panels;
     public static Vector3 hideLocation = new Vector3(0, -10, 0);
     public static Vector3 showLocation = new Vector3(0, 0, 0);
     public static float movingTime = 3;
     
 
     void Awake()
     {
         if (panels == null) panels = new Dictionary<PanelType, UIPanel>();
         if (panels.ContainsKey(typeofPanel) == false)
         {
             panels.Add(typeofPanel, this);
         }
         this.transform.position = hideLocation;
     }
 
     public static void showPanel(PanelType typeofPanel)
     {
         if(activePanel != null)
         {
             hidingPanel = activePanel;
             hidingPanel.hide();
         }
 
         activePanel = panels[typeofPanel];
         activePanel.Content.SetActive(true);
         activePanel.show();
     }
 
 
     public void show()
     {
         StartCoroutine(DoShow());
     }
 
     public IEnumerator DoShow()
     {
         while (getDistance(activePanel.Content.transform.position, showLocation) > 1)
         {
             activePanel.Content.transform.position = Vector3.Lerp(activePanel.Content.transform.position,
                 showLocation, 5f*Time.deltaTime);
             yield return null;
         }
         yield return new WaitForSeconds(movingTime);
     }
 
 
     public void hide()
     {
         StartCoroutine(DoHide());
     }
 
     public IEnumerator DoHide()
     {
         while(getDistance(hidingPanel.Content.transform.position, hideLocation) > 1)
         {
             hidingPanel.Content.transform.position = Vector3.Lerp(hidingPanel.Content.transform.position,
                 hideLocation, 5f*Time.deltaTime);
             yield return null;
         }
         yield return new WaitForSeconds(movingTime + 1.0f);
         hidingPanel.Content.SetActive(false);
     }
 
 
     public static float getDistance(Vector3 start, Vector3 end)
     {
         return Mathf.Sqrt(Mathf.Pow(start.x - end.x, 2) + Mathf.Pow(start.y - end.y, 2));
     }
 
 }
 
 public enum PanelType{
     BUY_BUILDING,
     BUY_FARM,
 }