From 00fbd15467c0882334e3fb9973cb4378d7fe4645 Mon Sep 17 00:00:00 2001
From: Nic <162764842+Nic-Polumeyv@users.noreply.github.com>
Date: Tue, 13 Oct 2026 00:04:26 -0400
Subject: [PATCH] restore the batch id check in BranchManager#commit and carry
 blocking_pending through #merge

---
 .../svelte/src/internal/client/dom/blocks/branches.js  | 10 ++++++----
 .../svelte/src/internal/client/reactivity/batch.js     |  6 ++++++
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/packages/svelte/src/internal/client/dom/blocks/branches.js b/packages/svelte/src/internal/client/dom/blocks/branches.js
index 1e3c59013d..272068a253 100644
--- a/packages/svelte/src/internal/client/dom/blocks/branches.js
+++ b/packages/svelte/src/internal/client/dom/blocks/branches.js
@@ -110,14 +110,16 @@ export class BranchManager {
 			}
 		}
 
-		for (const [b, k] of this.#batches) {
-			this.#batches.delete(b);
+		this.#batches.delete(batch);
 
-			if (b === batch) {
+		for (const [b, k] of this.#batches) {
+			if (b.id > batch.id) {
 				// keep values for newer batches
-				break;
+				continue;
 			}
 
+			this.#batches.delete(b);
+
 			const offscreen = this.#offscreen.get(k);
 
 			if (offscreen) {
diff --git a/packages/svelte/src/internal/client/reactivity/batch.js b/packages/svelte/src/internal/client/reactivity/batch.js
index 9f8ff0808b..f7729c75f2 100644
--- a/packages/svelte/src/internal/client/reactivity/batch.js
+++ b/packages/svelte/src/internal/client/reactivity/batch.js
@@ -621,6 +621,12 @@ export class Batch {
 		}
 
 		this.#pending += batch.#pending;
+		if (batch.#blocking_pending !== null) {
+			const blocking_pending = (this.#blocking_pending ??= new Map());
+			for (const [effect, count] of batch.#blocking_pending) {
+				blocking_pending.set(effect, (blocking_pending.get(effect) ?? 0) + count);
+			}
+		}
 
 		for (const c of batch.#commit_callbacks) {
 			this.oncommit(() => c(batch));