New Material instance not updating?

I have created a new material instance in order to have the roof and walls of my 3D builds fade in and out depending on if the player is within then. The problem is that when the material is applied to the mesh it does not update unless the material is clicked on within the editor.

Video Example:

The Material was created using the normal method via scripting

Code (CSharp):

1.  foreach (Material m in obj.GetComponent<Renderer>().materials)
2.  
3.         {
4.  
5.             m.SetFloat("_Mode", 2);
6.  
7.             m.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
8.  
9.             m.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
10.  
11.             m.SetInt("_ZWrite", 0);
12.  
13.             m.DisableKeyword("_ALPHATEST_ON");
14.  
15.             m.EnableKeyword("_ALPHABLEND_ON");
16.  
17.             m.DisableKeyword("_ALPHAPREMULTIPLY_ON");
18.  
19.             m.renderQueue = 3000;
20.  
21.         }

Not 100% sure if i am missing a keyword or if something is just not working correctly with 2018.2.0f2

 

Did you find the solution?