Bug Blur shader causes my screen to invert Android

So I have a pretty basic Blur shader I use for my UI as the background behind some UI elements. When I test it in the Editor it works perfectly, but when I build the game for Android, it flips everything behind the blur effect. So I either need someone to help me solve this issue or someone with knowledge about shader who would help me actually invert it back using the shader itself.

Code (CSharp):

1. GrabPass { }
2.      Pass
3.      {
4.          CGPROGRAM
5.          #pragma vertex vert
6.          #pragma fragment frag
7.          #include "UnityCG.cginc"
8.          struct appdata
9.          {
10.              float4 vertex : POSITION;
11.              float3 normal : NORMAL;
12.          };  
13.          struct v2f
14.          {
15.              float4 position : POSITION;
16.              float4 screenPos : TEXCOORD0;
17.          };
18.          half _BlurAmount;
19.          fixed4 _Color;
20.          sampler2D _GrabTexture : register(s0);
21.          v2f vert(appdata input)
22.          {
23.              v2f output;
24.              output.position = UnityObjectToClipPos(input.vertex);
25.              output.screenPos = output.position;
26.              return output;
27.          }
28.          half4 pixel;
29.          half2 uv;
30.          fixed i = 0;
31.          half iBlur;
32.          half4 frag(v2f input) : SV_Target
33.          {  
34.              uv = input.screenPos.xy / input.screenPos.w;
35.              uv.x = (uv.x + 1) * .5;
36.              uv.y = 1.0 - (uv.y + 1) * .5;
37.              pixel = 0;
38.              pixel += tex2D(_GrabTexture, half2(uv.x + 1.5 * _BlurAmount, uv.y + 0.5 * _BlurAmount));
39.              pixel += tex2D(_GrabTexture, half2(uv.x + 1.5 * _BlurAmount, uv.y - 0.5 * _BlurAmount));
40.              pixel += tex2D(_GrabTexture, half2(uv.x + 1.5 * _BlurAmount, uv.y - 1.5 * _BlurAmount));
41.              pixel += tex2D(_GrabTexture, half2(uv.x + 1.5 * _BlurAmount, uv.y - 2.5 * _BlurAmount));
42.              pixel += tex2D(_GrabTexture, half2(uv.x + 0.5 * _BlurAmount, uv.y + 2.5 * _BlurAmount));
43.              pixel += tex2D(_GrabTexture, half2(uv.x + 0.5 * _BlurAmount, uv.y + 1.5 * _BlurAmount));
44.              pixel += tex2D(_GrabTexture, half2(uv.x + 0.5 * _BlurAmount, uv.y + 0.5 * _BlurAmount));
45.              pixel += tex2D(_GrabTexture, half2(uv.x + 0.5 * _BlurAmount, uv.y - 0.5 * _BlurAmount));
46.              pixel += tex2D(_GrabTexture, half2(uv.x + 0.5 * _BlurAmount, uv.y - 1.5 * _BlurAmount));
47.              pixel += tex2D(_GrabTexture, half2(uv.x + 0.5 * _BlurAmount, uv.y - 2.5 * _BlurAmount));
48.              pixel += tex2D(_GrabTexture, half2(uv.x - 0.5 * _BlurAmount, uv.y + 2.5 * _BlurAmount));
49.              pixel += tex2D(_GrabTexture, half2(uv.x - 0.5 * _BlurAmount, uv.y + 1.5 * _BlurAmount));
50.            
51.              pixel += tex2D(_GrabTexture, half2(uv.x - 0.5 * _BlurAmount, uv.y + 0.5 * _BlurAmount));
52.              pixel += tex2D(_GrabTexture, half2(uv.x - 0.5 * _BlurAmount, uv.y - 0.5 * _BlurAmount));
53.              pixel += tex2D(_GrabTexture, half2(uv.x - 0.5 * _BlurAmount, uv.y - 1.5 * _BlurAmount));
54.              pixel += tex2D(_GrabTexture, half2(uv.x - 0.5 * _BlurAmount, uv.y - 2.5 * _BlurAmount));
55.              pixel += tex2D(_GrabTexture, half2(uv.x - 1.5 * _BlurAmount, uv.y + 2.5 * _BlurAmount));
56.              pixel += tex2D(_GrabTexture, half2(uv.x - 1.5 * _BlurAmount, uv.y + 1.5 * _BlurAmount));
57.              pixel += tex2D(_GrabTexture, half2(uv.x - 1.5 * _BlurAmount, uv.y + 0.5 * _BlurAmount));
58.              pixel += tex2D(_GrabTexture, half2(uv.x - 1.5 * _BlurAmount, uv.y - 0.5 * _BlurAmount));
59.              pixel += tex2D(_GrabTexture, half2(uv.x, uv.y));
60.              return (pixel / 20.0) * _Color;
61.          }
62.          ENDCG
63.      }
64. }