diff --git a/src/lib/middleware/request-logger.ts b/src/lib/middleware/request-logger.ts
index 6b75e0c015..91468b3ed9 100644
--- a/src/lib/middleware/request-logger.ts
+++ b/src/lib/middleware/request-logger.ts
@@ -14,7 +14,7 @@ const requestLogger: (config: IUnleashConfig) => RequestHandler = (config) => {
         if (enable) {
             res.on('finish', () => {
                 const { pathname } = url.parse(req.originalUrl);
-                if (res.statusCode >= 400 || res.statusCode < 500) {
+                if (res.statusCode >= 400 && res.statusCode < 500) {
                     impactMetrics?.incrementCounter(CLIENT_ERROR_COUNT);
                 }
                 if (res.statusCode >= 500) {
diff --git a/src/lib/util/flag-resolver.ts b/src/lib/util/flag-resolver.ts
index 0551e8cedc..453e6ea84a 100644
--- a/src/lib/util/flag-resolver.ts
+++ b/src/lib/util/flag-resolver.ts
@@ -6,6 +6,7 @@ import type {
     IFlags,
     IFlagResolver,
     IFlagKey,
+    IImpactMetricsResolver,
 } from '../types/experimental.js';
 import { getDefaultVariant } from 'unleash-client/lib/variant.js';
 
@@ -65,6 +66,10 @@ export default class FlagResolver implements IFlagResolver {
     getStaticContext(): IFlagContext {
         return this.externalResolver.getStaticContext();
     }
+
+    get impactMetrics(): IImpactMetricsResolver | undefined {
+        return this.externalResolver?.impactMetrics;
+    }
 }
 
 export const getVariantValue = <T = string>(