I switched to the new PBR shader which I spied from another resource and I see again this weird specular artifact. Or is every Sponza supposed to be like that?

sponza artifact 1 sponza artifact 2

Here is my PBR shader:

float4 albedo = gBufferAlbedo.Sample(pointTextureSampler, uv);
float4 normalAndRough = gBufferNormalRoughness.Sample(pointTextureSampler, uv);
float3 normal = normalAndRough.rgb;
float roughness = normalAndRough.a;
float metallic = gBufferPositionMetallic.Sample(pointTextureSampler, uv).w;

float3 WorldPos = gBufferPositionMetallic.Sample(pointTextureSampler, uv).xyz;

float3 N = normalize(normal);
float3 V = normalize(camPos - WorldPos.xyz);

float3 F0 = float3(0.04, 0.04, 0.04);
F0 = lerp(F0, albedo.rgb, metallic);
           
// reflectance equation
float3 Lo = float3(0.0, 0.0, 0.0);
for (int i = 0; i < numLights; ++i)
{
    // calculate per-light radiance
    float3 L = normalize(lightPos[i].xyz - WorldPos.xyz);
    float3 H = normalize(V + L);
    float distance = length(lightPos[i].xyz - WorldPos.xyz);
    float attenuation = 1.0 / (conLinQuad[0] + conLinQuad[1] * distance + conLinQuad[2] * (distance * distance));

    float3 radiance = lightColor * attenuation;
    
    // cook-torrance brdf
    float NDF = DistributionGGX(N, H, roughness);
    float G = GeometrySmith(N, V, L, roughness);
    float3 F = FresnelSchlick(max(dot(H, V), 0.0), F0);
    
    float3 kS = F;
    float3 kD = float3(1.f, 1.f, 1.f) - kS;
    kD *= 1.0 - metallic;
    
    float3 numerator = NDF * G * F;
    float denominator = 4.0 * max(dot(N, V), 0.0) * max(dot(N, L), 0.0);
    float3 specular = numerator / max(denominator, 0.001);
        
    // add to outgoing radiance Lo
    float NdotL = max(dot(N, L), 0.0);
    Lo += (kD * albedo.rgb / PI + specular) * radiance * NdotL;
}

return float4(Lo, 1.f);

I tried to change this Sponza to another and the artifacts remained the same.