From 782305df4bb464a2c7d04bc2a1219924b28f279d Mon Sep 17 00:00:00 2001
From: Kristiyan Kostadinov <crisbeto@abv.bg>
Date: Fri, 27 Jun 2025 09:10:19 +0200
Subject: [PATCH] fix(cdk/tree): remove leaking subscription

Fixes that we weren't unsubscribing from one observable in the tree.

Fixes #31454.
---
 src/cdk/tree/tree.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cdk/tree/tree.ts b/src/cdk/tree/tree.ts
index 497ba28d4b86..e6e485e733f5 100644
--- a/src/cdk/tree/tree.ts
+++ b/src/cdk/tree/tree.ts
@@ -1400,6 +1400,7 @@ export class CdkTreeNode<T, K = T> implements OnDestroy, OnInit, TreeKeyManagerI
       .changed.pipe(
         map(() => this.isExpanded),
         distinctUntilChanged(),
+        takeUntil(this._destroyed),
       )
       .subscribe(() => this._changeDetectorRef.markForCheck());
     this._tree._setNodeTypeIfUnset(this._type);