diff --git a/web/app/components/base/chat/utils.ts b/web/app/components/base/chat/utils.ts
index ce7a7c09b3..2b4112935e 100644
--- a/web/app/components/base/chat/utils.ts
+++ b/web/app/components/base/chat/utils.ts
@@ -100,7 +100,7 @@ function getThreadMessages(tree: ChatItemInTree[], targetMessageId?: string): Ch
   let targetNode: ChatItemInTree | undefined
 
   // find path to the target message
-  const stack = tree.toReversed().map(rootNode => ({
+  const stack = tree.slice().reverse().map(rootNode => ({
     node: rootNode,
     path: [rootNode],
   }))