diff --git a/.env.development b/.env.development
index ebd8cef..10bfce2 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.699
+NEXT_PUBLIC_APP_VERSION=1.6.700
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index 0e41954..ac437cc 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.699
+NEXT_PUBLIC_APP_VERSION=1.6.700
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index acad8bb..5be9714 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [1.6.700] – 2025-08-12
+
+- Isolatioswiderstand Chart abhängig von dropdown menu select name und nicht von Titel
+
+---
 ## [1.6.699] – 2025-08-12
 
 - chore(eslint): ignore irregular whitespace in comments (keep rule strict for code)
diff --git a/package-lock.json b/package-lock.json
index b86ea76..b55d315 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.699",
+  "version": "1.6.700",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.699",
+      "version": "1.6.700",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@headlessui/react": "^2.2.4",
diff --git a/package.json b/package.json
index 3541684..dce8d5e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.699",
+  "version": "1.6.700",
   "private": true,
   "scripts": {
     "dev": "next dev",
diff --git a/services/fetchMessagesService.ts b/services/fetchMessagesService.ts
index 4eb2955..8c6150b 100644
--- a/services/fetchMessagesService.ts
+++ b/services/fetchMessagesService.ts
@@ -13,9 +13,15 @@ export const fetchMessagesService = async (
   const tm = String(to.getMonth() + 1).padStart(2, "0");
   const td = String(to.getDate()).padStart(2, "0");
 
-  const isDev =
-    typeof window !== "undefined" && window.location.hostname === "localhost";
-  const url = isDev
+  const isLocalHost =
+    typeof window !== "undefined" &&
+    ["localhost", "127.0.0.1", "::1"].includes(window.location.hostname);
+  const forceMocks =
+    typeof process !== "undefined" &&
+    process.env.NEXT_PUBLIC_USE_MOCKS === "1";
+  const useMocks = forceMocks || isLocalHost;
+
+  const url = useMocks
     ? `/api/cpl/messages?fromDate=${fromDate}&toDate=${toDate}`
     : `/CPL?Service/ae.ACP&MSS1=${fy};${fm};${fd};${ty};${tm};${td};All`;