[BUG] Unable to render few objects with Graphics.DrawProcedural and vertex compute buffer

Hi everyone,

I cannot render several objects using Graphics.DrawProcedural.

So, I'm using compute shaders to generate geometry.
Then I prepare all the vertices which I wanna render in a vertex compute buffer.
Then I use Graphics.DrawProcedural to render the geometry from the buffer.
It totally works fine with just 1 object but if I render a few objects then sometimes only one object is shown.
Why it could be?

Code (CSharp):

1. public class Renderer : MonoBehaviour {
2.  
3.      public Material mat;
4.  
5.      ComputeBuffer _vertices;
6.     int _verticesCount;
7.  
8.    void Start() {
9.  
10.       //here i'm generating the vertices and saving them to _vertices buffer
11.       CreateBuffers();
12.  
13.       MeshRenderer mr = this.GetComponent<MeshRenderer>();
14.       if(mr!=null) mr.enabled = false;
15.  
16.    }
17.  
18.    void OnRenderObject(){
19.  
20.       mat.SetPass(0);
21.       mat.SetBuffer("_vertices", _vertices);
22.       Graphics.DrawProcedural(MeshTopology.Triangles, _verticesCount);
23.  
24.    }
25. }