Raycast hit done wrong using ScreenPointToRay coordinates

Hello guys, after two days of search I finally decided to give up on my attempts to make this work and I decided to ask for help from those who most certainly know more about me :P What I am trying to achieve is simple in its core mechanics, but still is driving me mad: my final goal is to change some objects attributes by clicking on them in the Scene Editor window, so far I managed to make it work only on some clicks, but most of the times it works even when I do not click the right position.

So far I have a simple plane mesh (imported from blender), with a script attached to it that makes it blue when I click it. The plane is scaled on both x and y axis and has a box collider that fits the mesh (checked both in ortho and perspective mode):

 using UnityEngine;
 using System.Collections;
 using UnityEditor;
 
 [ExecuteInEditMode]
 public class TileHandler : MonoBehaviour {
     public void colorChange () {
         GetComponent<Renderer>().sharedMaterial.color = Color.blue;
         Debug.Log("Color changed");
     }
 }
 

In the Editor folder I have another script that checks whether the mouse click hits the target or not, and call the proper method in case.

 using UnityEngine;
 using UnityEditor;
 
 [InitializeOnLoad]
 [CustomEditor(typeof(TileHandler))]
 
 public class MouseHelper : Editor
 {
     //static TileHandler tile;
      //public override void OnInspectorGUI() {
         //tile = (TileHandler) target;
     //}
     
     static MouseHelper()
     {
         SceneView.onSceneGUIDelegate += UpdateView;
     }
  
     private static void UpdateView(SceneView sceneView)
     {
         if (Event.current.type == EventType.mouseDown){
             RaycastHit hit; 
             Ray ray = Camera.current.ScreenPointToRay(Event.current.mousePosition); 
             if(Physics.Raycast(ray, out hit, 20000)){
                 TileHandler g = (TileHandler) hit.transform.gameObject.GetComponent<TileHandler>();
                 Undo.RecordObject(g.GetComponent<Renderer>().sharedMaterial, "Undo Color Change");
                 g.colorChange();
                 EditorUtility.SetDirty(g);
             }
         }
     }
 }

I know the code is not optimized, but i was just trying to make it work. Can you spot what am I doing wrong? The scene is a 3D one.