From 113a4f1728b8fa04f521e45043fde350b4dbbe0a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Germ=C3=A1n=20Jablo=C3=B1ski?=
 <43938777+GermanJablo@users.noreply.github.com>
Date: Fri, 31 Jan 2025 14:29:36 -0300
Subject: [PATCH] create a new object in setState

---
 packages/lexical/src/LexicalNode.ts                     | 3 ++-
 packages/lexical/src/__tests__/unit/LexicalNode.test.ts | 9 ++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/packages/lexical/src/LexicalNode.ts b/packages/lexical/src/LexicalNode.ts
index f3239c5b74b..30b9be1e441 100644
--- a/packages/lexical/src/LexicalNode.ts
+++ b/packages/lexical/src/LexicalNode.ts
@@ -243,7 +243,7 @@ export class LexicalNode {
 
   setState<T extends StateKey>(k: T, v: T['value']) {
     const self = this.getWritable();
-    (self.__state as State)[k.key] = v;
+    self.__state = {...self.__state, [k.key]: v};
   }
 
   // Flow doesn't support abstract classes unfortunately, so we can't _force_
@@ -333,6 +333,7 @@ export class LexicalNode {
     this.__parent = prevNode.__parent;
     this.__next = prevNode.__next;
     this.__prev = prevNode.__prev;
+    this.__state = prevNode.__state || {};
   }
 
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
diff --git a/packages/lexical/src/__tests__/unit/LexicalNode.test.ts b/packages/lexical/src/__tests__/unit/LexicalNode.test.ts
index 466538c9712..43ad84a40cf 100644
--- a/packages/lexical/src/__tests__/unit/LexicalNode.test.ts
+++ b/packages/lexical/src/__tests__/unit/LexicalNode.test.ts
@@ -1618,11 +1618,10 @@ describe('LexicalNode state', () => {
           type _Test = Expect<
             Equal<
               typeof paragraphObject,
-              | {
-                  readonly bar: number;
-                  readonly foo: string;
-                }
-              | undefined
+              {
+                readonly bar: number;
+                readonly foo: string;
+              }
             >
           >;