Strange string appending

Hi, i am trying to make a basic chat window, but when i try to build the string from the character pressed by the user on the keyboard, it get very strange. If i write the following message "Hello", the actual string seems to look something like this: "H e l l o" and not "Hello" as i want it to be.

I can see the error when i try to delete a character in the inputTextBox window. I need to press backspace twice for one character to be removed.

 public class ChattWindow : MonoBehaviour {
     
     private string inputField = " ";
     private Vector2 scrollPosition = Vector2.zero;
     //StringBuilder sb;
     private string ChattWindowText = "";
     // Use this for initialization
     void Start () {
         //sb = new StringBuilder();
     }
     
     // Update is called once per frame
     void Update () {
     
     }
     void Awake(){
         
     }
     void OnGUI(){
         Event e = Event.current;
         int i = 0;
         if(e.type == EventType.keyDown && e.keyCode == KeyCode.Return){
             ChattWindowText = ChattWindowText + inputField;
             
             while(i != inputField.Length){
                 Debug.Log(inputField[i]);
                 i++;
             }
             
             inputField = "";
             
             
         }else if(e.type == EventType.keyDown && e.keyCode == KeyCode.Backspace){
             inputField = inputField.Substring(0,inputField.Length - 1);
             Debug.Log(inputField.Length);
             Debug.Log(inputField);
             
         }else if(e.type == EventType.keyDown){
             inputField = inputField + e.character;
             
         }
         
         GUILayout.BeginArea(new Rect (0,Screen.height - 250,300,200));
         scrollPosition = GUILayout.BeginScrollView(scrollPosition, GUILayout.Width(300), GUILayout.Height(200));
         
         GUILayout.Label(ChattWindowText);
         GUILayout.EndScrollView();
         
     
         GUILayout.EndArea();
         GUI.TextField (new Rect (0,Screen.height - 50,300,50), inputField);
     }
     
 }