The problems comes from user's code changing the shader on the affected object's materials:
In ButtonManager.cs if the following two section are outcommented the issue does not reproduce.

foreach (Material mat in bldg.GetComponent<Renderer>().materials)
{
mat.shader = Shader.Find("Transparent/Diffuse");
mat.color = new Color(mat.color.r, mat.color.g, mat.color.b, 0.5f);
}

and

foreach (Material mat in bldg.GetComponent<Renderer>().materials)
{

mat.shader = Shader.Find("Standard");
mat.color = new Color(mat.color.r, mat.color.g, mat.color.b, 1f);
}

The problem that the Player behaves differently than in the Editor likely comes down to "Transparent/Diffuse" is not part of the assets build for the Player since it is only referenced by a string here.