Question Custom shader glitches on android

Hi, I found long time ago nice shader to tile texture on simple figures like cube, but holding scale, so cube 3x1x1 will still have same texture scale, but repeated 3x. You get the idea. For any level im creating walls and mix them in one object with one texture. And everything is great, but on android I have some white glitches.

Hm, when I want to edit post I can see this video, but in topic, no.
Link:
https://imgur.com/a/ZJZoEn6

GIF isn't perfect for video, but Im pretty sure you can see glitches on walls.
Shader code:

Code (Boo):

1. Shader "Custom/Wall"
2. {
3.   Properties
4.   {
5.     _Color ("Main Color", Color) = (1,1,1,1)
6.     _MainTex ("Base (RGB)", 2D) = "white" {}
7.     _Scale ("Texture Scale", Float) = 1.0
8.   }
9.  
10.   SubShader
11.   {
12.  
13.     Tags { "RenderType"="Opaque" }
14.     LOD 200
15.  
16.     CGPROGRAM
17.     #pragma surface surf Lambert fullforwardshadows
18.  
19.     #pragma target 3.0
20.     sampler2D _MainTex;
21.     fixed4 _Color;
22.     float _Scale;
23.  
24.     struct Input
25.     {
26.       float3 worldNormal;
27.       float3 worldPos;
28.     };
29.  
30.     void surf (Input IN, inout SurfaceOutput o)
31.     {
32.       float2 UV;
33.       fixed4 c;
34.         float4 col = _Color;
35.       if(abs(IN.worldNormal.x)>0.5)
36.       {
37.         UV = IN.worldPos.yz; // side
38.         c = tex2D(_MainTex, UV* _Scale); // use WALLSIDE texture
39.         col.rgb*=0.6f;
40.       }
41.       else if(abs(IN.worldNormal.z)>0.5)
42.       {
43.         UV = IN.worldPos.xy; // front
44.         c = tex2D(_MainTex, UV* _Scale); // use WALL texture
45.         col.rgb*=0.6f;
46.       }
47.       else
48.       {
49.         UV = IN.worldPos.xz; // top
50.         c = tex2D(_MainTex, UV* _Scale); // use FLR texture
51.       }
52.  
53.       o.Albedo = c.rgb * col;
54.     }
55.     ENDCG
56.   }
57.  
58.   Fallback "VertexLit"
59. }

 

Anyone? It is in wrong section?