Correctly Implementing SSAO

Question

I am trying to implement Normal-Oriented SSAO and i'm having an issue with the results. Portions of the screen are inverted/wrong, typically half way through the screen but not always, it seems tied to the camera, but can also be anything lol. Here is the resulting render:

And here is the SSAO Shader:

void main()
{

  vec3 WorldPosition = texture(GPositionsTexture, In_TexCoords).xyz;
  vec3 WorldNormal = normalize(UnScaleNormal( texture( GNormalsTexture, In_TexCoords ).xyz ));

  vec3 Random = texture(KernalNoiseTexture, In_TexCoords * KernelNoiseScale).xyz;
  vec3 Tangent = normalize(Random - WorldNormal * dot(Random, WorldNormal));
  vec3 BiTangent = cross(WorldNormal, Tangent);
  mat3 TBN = mat3(Tangent, BiTangent, WorldNormal);

  float Occlusion = 0.0;
  for (int i = 0; i < KERNEL_SIZE; ++i)
  {
    // get sample position:
    vec3 Sample = inverse(TBN) * Kernel[i];
    Sample = Sample * Radius + WorldPosition;

    // project sample position:
    vec4 Offset = vec4(Sample, 1.0);
    Offset = CamData.Projection * CamData.View * Offset;
    Offset.xy /= Offset.w;
    Offset.xy = Offset.xy * 0.5 + 0.5;

    // get sample depth:
    float SampleDepth = texture(GPositionsTexture, Offset.xy).z;

    // range check & accumulate:
    float RangeCheck= abs(WorldPosition.z - SampleDepth) < Radius ? 1.0 : 0.0;
    Occlusion += (SampleDepth <= Sample.z ? 1.0 : 0.0) * RangeCheck;
  }

Occlusion = 1 - (Occlusion / KERNEL_SIZE);

Out_Diffuse = pow(Occlusion, Power);
}