UsePass not using the right Shader variant on iOS

Hello,

I use a replacement shader for one of my cameras and I want the opaque elements to be rendered with a custom shader, but I want the transparent objects to stay the same. My replacement shader looks like this:

Code (CSharp):

1. Shader "Hidden/CustomReplShader"
2. {
3.     Properties
4.     {
5.     }
6.  
7.     SubShader
8.     {
9.         Tags { "RenderType" = "Distort" }
10.         ZTest LEqual
11.         Cull Off
12.         Lighting Off
13.  
14.         LOD 200
15.  
16.         UsePass "CustomShaders/Particles/VFX"
17.     }
18.  
19.     SubShader
20.     {
21.         Tags { "IgnoreProjector" = "True" "RenderType" = "Opaque" }
22.         ZTest LEqual
23.         Cull Back
24.         Lighting Off
25.  
26.         LOD 200
27.  
28.         Pass
29.         {
30.             Blend Off
31.  
32.             Name "OPAQUE_REPLACEMENT"
33.             Tags{ "LightMode" = "Always" }
34.             Fog { Mode Off }
35.  
36.             Lighting Off
37.             SeparateSpecular Off
38.  
39.             Color(0, 0, 0, 1)
40.         }
41.     }
42.  
43.     FallBack Off
44. }

The problem is that it is not using the proper shader variant on the device, but it does on windows. Any idea why this might be happening?