diff --git a/src/lib/proxy/proxy-controller.ts b/src/lib/proxy/proxy-controller.ts
index fd8ac1d68e..3d233aa3f3 100644
--- a/src/lib/proxy/proxy-controller.ts
+++ b/src/lib/proxy/proxy-controller.ts
@@ -21,7 +21,6 @@ import NotImplementedError from '../error/not-implemented-error';
 import NotFoundError from '../error/notfound-error';
 import rateLimit from 'express-rate-limit';
 import { minutesToMilliseconds } from 'date-fns';
-import isEqual from 'lodash.isequal';
 
 interface ApiUserRequest<
     PARAM = any,
@@ -175,34 +174,14 @@ export default class FrontendAPIController extends Controller {
         if (!this.config.flagResolver.isEnabled('embedProxy')) {
             throw new NotFoundError();
         }
-        let toggles: ProxyFeatureSchema[];
-        let newToggles: ProxyFeatureSchema[];
-        if (this.config.flagResolver.isEnabled('globalFrontendApiCache')) {
-            [toggles, newToggles] = await Promise.all([
-                this.services.proxyService.getProxyFeatures(
-                    req.user,
-                    FrontendAPIController.createContext(req),
-                ),
-                this.services.proxyService.getNewProxyFeatures(
-                    req.user,
-                    FrontendAPIController.createContext(req),
-                ),
-            ]);
-            if (
-                !isEqual(
-                    toggles.sort((a, b) => a.name.localeCompare(b.name)),
-                    newToggles.sort((a, b) => a.name.localeCompare(b.name)),
-                )
-            ) {
-                this.logger.warn(
-                    `old features and new features are different. Old count ${toggles.length}, new count ${newToggles.length}`,
-                );
-            }
-        } else {
-            toggles = await this.services.proxyService.getProxyFeatures(
+        const toggles: ProxyFeatureSchema[] =
+            await this.services.proxyService.getProxyFeatures(
                 req.user,
                 FrontendAPIController.createContext(req),
             );
+        if (this.config.flagResolver.isEnabled('globalFrontendApiCache')) {
+            // deliberately run comparison without blocking
+            void this.services.proxyService.compareToggleDefinitions(req.user);
         }
 
         res.set('Cache-control', 'no-cache');
diff --git a/src/lib/proxy/proxy-service.ts b/src/lib/proxy/proxy-service.ts
index eb6c6bfaef..9a88df2a7c 100644
--- a/src/lib/proxy/proxy-service.ts
+++ b/src/lib/proxy/proxy-service.ts
@@ -19,6 +19,7 @@ import { PROXY_REPOSITORY_CREATED } from '../metric-events';
 import { ProxyRepository } from './index';
 import { FrontendApiRepository } from './frontend-api-repository';
 import { GlobalFrontendApiCache } from './global-frontend-api-cache';
+import isEqual from 'lodash.isequal';
 
 export type Config = Pick<
     IUnleashConfig,
@@ -94,6 +95,25 @@ export class ProxyService {
             }));
     }
 
+    async compareToggleDefinitions(token: IApiUser) {
+        const oldClient = await this.clientForProxyToken(token);
+        const oldDefinitions = oldClient.getFeatureToggleDefinitions() || [];
+
+        const newClient = await this.newClientForProxyToken(token);
+        const newDefinitions = newClient.getFeatureToggleDefinitions() || [];
+
+        if (
+            !isEqual(
+                oldDefinitions.sort((a, b) => a.name.localeCompare(b.name)),
+                newDefinitions.sort((a, b) => a.name.localeCompare(b.name)),
+            )
+        ) {
+            this.logger.warn(
+                `old features definitions and new features definitions are different. Old definitions count ${oldDefinitions.length}, new count ${newDefinitions.length}`,
+            );
+        }
+    }
+
     async getNewProxyFeatures(
         token: IApiUser,
         context: Context,