From 66f885b115ee7d23c9f97a1cc43d7a8bf1d8a138 Mon Sep 17 00:00:00 2001
From: James Tu <j.tu@salesforce.com>
Date: Tue, 30 Jan 2024 15:01:13 -0800
Subject: [PATCH] chore: update mutation tracker logic

---
 .../@lwc/engine-core/src/libs/mutation-tracker/index.ts     | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/packages/@lwc/engine-core/src/libs/mutation-tracker/index.ts b/packages/@lwc/engine-core/src/libs/mutation-tracker/index.ts
index df4811de8b..c69b672bbc 100644
--- a/packages/@lwc/engine-core/src/libs/mutation-tracker/index.ts
+++ b/packages/@lwc/engine-core/src/libs/mutation-tracker/index.ts
@@ -70,17 +70,14 @@ export type JobFunction = () => void;
 export class ReactiveObserver {
     private listeners: (ObservedMemberPropertyRecords | CallbackFunction)[] = [];
     private callback: CallbackFunction;
-    private isActive: boolean;
 
     constructor(callback: CallbackFunction) {
         this.callback = callback;
-        this.isActive = false;
     }
 
     observe(job: JobFunction) {
         const inceptionReactiveRecord = currentReactiveObserver;
         currentReactiveObserver = this;
-        this.isActive = true;
         let error;
         try {
             job();
@@ -88,7 +85,6 @@ export class ReactiveObserver {
             error = Object(e);
         } finally {
             currentReactiveObserver = inceptionReactiveRecord;
-            this.isActive = false;
             if (error !== undefined) {
                 throw error; // eslint-disable-line no-unsafe-finally
             }
@@ -144,6 +140,6 @@ export class ReactiveObserver {
     }
 
     isObserving() {
-        return this.isActive;
+        return currentReactiveObserver === this;
     }
 }