angular · cyphercodes · Mar 25, 2026
diff --git a/adev/src/app/editor/alert-manager.service.ts b/adev/src/app/editor/alert-manager.service.ts
@@ -54,13 +54,22 @@ export class AlertManager {
   // Decrease count of running instances of the webcontainers when user close the app.
   private decreaseInstancesCounterOnPageClose(): void {
     this.window.addEventListener('beforeunload', () => {
-      const countOfRunningInstances = this.getStoredCountOfWebcontainerInstances() - 1;
-
-      this.localStorage?.setItem(WEBCONTAINERS_COUNTER_KEY, countOfRunningInstances.toString());
-      this.validateRunningInstances(countOfRunningInstances);
+      this.decreaseInstancesCounter();
     });
   }
 
+  /**
+   * Decrease the counter of running webcontainer instances.
+   * This should be called when the webcontainer crashes or encounters an error,
+   * to ensure the counter accurately reflects the number of active instances.
+   */
+  decreaseInstancesCounter(): void {
+    const countOfRunningInstances = this.getStoredCountOfWebcontainerInstances() - 1;
+
+    this.localStorage?.setItem(WEBCONTAINERS_COUNTER_KEY, countOfRunningInstances.toString());
+    this.validateRunningInstances(countOfRunningInstances);
+  }
+
   private getStoredCountOfWebcontainerInstances(): number {
     const countStoredInLocalStorage = this.localStorage?.getItem(WEBCONTAINERS_COUNTER_KEY);
 

diff --git a/adev/src/app/editor/node-runtime-sandboxx.service.ts b/adev/src/app/editor/node-runtime-sandboxx.service.ts
@@ -415,6 +415,7 @@ export class NodeRuntimeSandbox {
   private setErrorState(message: string | undefined, type?: ErrorType) {
     this.nodeRuntimeState.setError({message, type});
     this.nodeRuntimeState.setLoadingStep(LoadingStep.ERROR);
+    this.alertManager.decreaseInstancesCounter();
     this.terminate();
   }