From 2f988519897a0fbed7b7fb49be886bc3c2d88071 Mon Sep 17 00:00:00 2001
From: Dmitrii Troitskii <jsleitor@gmail.com>
Date: Wed, 18 Feb 2026 23:58:40 +0000
Subject: [PATCH 1/2] fix(react-db): handle rejected/stale setWindow promises
 in useLiveInfiniteQuery
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Three issues in the useEffect that calls setWindow():

1. No .catch() — if setWindow rejects, isFetchingNextPage stays true
   forever with no error surfaced.

2. No cleanup — if the effect re-runs while a previous promise is
   pending, the stale .then() can set isFetchingNextPage=false
   prematurely while new loading is in progress.

3. Unhandled promise rejection — the promise has no rejection handler,
   causing an unhandled rejection warning.

Add .catch() with error logging, a cancelled flag with useEffect
cleanup to ignore stale promise settlements.

Fixes TanStack/db#1240
---
 packages/react-db/src/useLiveInfiniteQuery.ts | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/packages/react-db/src/useLiveInfiniteQuery.ts b/packages/react-db/src/useLiveInfiniteQuery.ts
index 0351c6d0c..360505c2d 100644
--- a/packages/react-db/src/useLiveInfiniteQuery.ts
+++ b/packages/react-db/src/useLiveInfiniteQuery.ts
@@ -233,6 +233,7 @@ export function useLiveInfiniteQuery<TContext extends Context>(
     if (!isCollection && !queryResult.isReady) return
 
     // Adjust the window
+    let cancelled = false
     const result = utils.setWindow({
       offset: expectedOffset,
       limit: expectedLimit,
@@ -240,12 +241,23 @@ export function useLiveInfiniteQuery<TContext extends Context>(
 
     if (result !== true) {
       setIsFetchingNextPage(true)
-      result.then(() => {
-        setIsFetchingNextPage(false)
-      })
+      result
+        .then(() => {
+          if (!cancelled) setIsFetchingNextPage(false)
+        })
+        .catch((error: unknown) => {
+          if (!cancelled) {
+            setIsFetchingNextPage(false)
+            console.error(`useLiveInfiniteQuery: setWindow failed:`, error)
+          }
+        })
     } else {
       setIsFetchingNextPage(false)
     }
+
+    return () => {
+      cancelled = true
+    }
   }, [
     isCollection,
     queryResult.collection,

From bc1a70598c65b9062696a4b21efc3885e4db4689 Mon Sep 17 00:00:00 2001
From: Dmitrii Troitskii <jsleitor@gmail.com>
Date: Thu, 19 Feb 2026 10:29:53 +0000
Subject: [PATCH 2/2] add changeset

---
 .changeset/fix-setwindow-promises.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/fix-setwindow-promises.md

diff --git a/.changeset/fix-setwindow-promises.md b/.changeset/fix-setwindow-promises.md
new file mode 100644
index 000000000..5cf337e8a
--- /dev/null
+++ b/.changeset/fix-setwindow-promises.md
@@ -0,0 +1,5 @@
+---
+"@tanstack/react-db": patch
+---
+
+fix(react-db): handle rejected/stale setWindow promises in useLiveInfiniteQuery