diff --git a/README.md b/README.md
index 5ff0ef264..627f7cb2a 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,8 @@ Executes Javascript, Typescript Scripts.
     ### **WORK IN PROGRESS**
 -->
 ### WORK IN PROGRESS
+* (Eistee82) Fix: prevent duplicate 'Stopping script' log when script is not running
+* (Eistee82) Fix: only restart scripts on the instance that owns them
 * (Eistee82) Added OID display mode toggle for Blockly editor: 4 display modes (Name, Name path, State ID, Full ID) with toolbar dropdown, context menu, optional object icons, and translations in 11 languages
 * Per-provider test buttons in adapter config (OpenAI, Anthropic, Gemini, DeepSeek, Custom API)
 * Optional API key field for custom base URL providers (e.g. Ollama without auth)
diff --git a/build/main.js b/build/main.js
index 1fbe944d1..554480f45 100644
--- a/build/main.js
+++ b/build/main.js
@@ -578,9 +578,9 @@ class JavaScript extends adapter_core_1.Adapter {
                         await this.loadScriptById(id);
                     }
                 }
-                else {
-                    // if (obj.common.source !== formerObj.common.source) {
-                    // Source changed => restart the script
+                else if (obj.common.engine === `system.adapter.${this.namespace}` ||
+                    formerObj.common.engine === `system.adapter.${this.namespace}`) {
+                    // Source changed => restart the script (only on the relevant instance)
                     this.stopCounters[id] = this.stopCounters[id] ? this.stopCounters[id] + 1 : 1;
                     void this.stopScript(id).then(() => {
                         // only start again after stop when "last" object change to prevent problems on
@@ -2179,6 +2179,9 @@ class JavaScript extends adapter_core_1.Adapter {
         }
     }
     async stopScript(name) {
+        if (!this.scripts[name]) {
+            return false;
+        }
         this.log.info(`${name}: Stopping script`);
         await this.setState(`scriptEnabled.${name.substring(SCRIPT_CODE_MARKER.length)}`, false, true);
         if (this.messageBusHandlers[name]) {
diff --git a/src/main.ts b/src/main.ts
index 9c2e002cf..c7b75c31d 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -675,9 +675,11 @@ class JavaScript extends Adapter {
                         // Start script
                         await this.loadScriptById(id);
                     }
-                } else {
-                    // if (obj.common.source !== formerObj.common.source) {
-                    // Source changed => restart the script
+                } else if (
+                    obj.common.engine === `system.adapter.${this.namespace}` ||
+                    formerObj.common.engine === `system.adapter.${this.namespace}`
+                ) {
+                    // Source changed => restart the script (only on the relevant instance)
                     this.stopCounters[id] = this.stopCounters[id] ? this.stopCounters[id] + 1 : 1;
                     void this.stopScript(id).then(() => {
                         // only start again after stop when "last" object change to prevent problems on
@@ -2601,6 +2603,10 @@ class JavaScript extends Adapter {
     }
 
     async stopScript(name: string): Promise<boolean> {
+        if (!this.scripts[name]) {
+            return false;
+        }
+
         this.log.info(`${name}: Stopping script`);
 
         await this.setState(`scriptEnabled.${name.substring(SCRIPT_CODE_MARKER.length)}`, false, true);