diff --git a/.changeset/tangy-icons-dig.md b/.changeset/tangy-icons-dig.md
new file mode 100644
index 0000000000..6d87912bbb
--- /dev/null
+++ b/.changeset/tangy-icons-dig.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: unset context synchronously in `run`
diff --git a/packages/svelte/src/internal/client/reactivity/async.js b/packages/svelte/src/internal/client/reactivity/async.js
index c1d4cbcd67..12c5e9baa5 100644
--- a/packages/svelte/src/internal/client/reactivity/async.js
+++ b/packages/svelte/src/internal/client/reactivity/async.js
@@ -303,15 +303,21 @@ export function run(thunks) {
 			.then(() => {
 				restore();
 
-				if (errored) {
-					throw errored.error;
+				try {
+					if (errored) {
+						throw errored.error;
+					}
+
+					if (aborted(active)) {
+						throw STALE_REACTION;
+					}
+
+					return fn();
+				} finally {
+					// We gotta unset context directly in case the function returns a promise, in which case
+					// unset_context in .finally() would be too late ...
+					unset_context();
 				}
-
-				if (aborted(active)) {
-					throw STALE_REACTION;
-				}
-
-				return fn();
 			})
 			.catch(handle_error);
 
@@ -320,6 +326,7 @@ export function run(thunks) {
 
 		promise.finally(() => {
 			blocker.settled = true;
+			// ... but we also need it after such a promise has resolved in case it restores our context
 			unset_context();
 		});
 	}
diff --git a/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/Child.svelte b/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/Child.svelte
new file mode 100644
index 0000000000..6f84dc319e
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/Child.svelte
@@ -0,0 +1,7 @@
+<script>
+	import { push } from "./main.svelte";
+	const x = await push(1);
+	const y = await push(2);
+</script>
+
+{x} {y}
diff --git a/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/_config.js b/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/_config.js
new file mode 100644
index 0000000000..a0dc38c660
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/_config.js
@@ -0,0 +1,26 @@
+import { tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target }) {
+		const [show, resolve, count] = target.querySelectorAll('button');
+
+		show.click();
+		await tick();
+		resolve.click();
+		await tick();
+		count.click();
+		await tick();
+		assert.htmlEqual(
+			target.innerHTML,
+			'<button>show</button> <button>resolve</button> <button>1</button>'
+		);
+
+		resolve.click();
+		await tick();
+		assert.htmlEqual(
+			target.innerHTML,
+			'1 2 <button>show</button> <button>resolve</button> <button>1</button>'
+		);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/main.svelte b/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/main.svelte
new file mode 100644
index 0000000000..0a5346cc47
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-run-isolated-batch/main.svelte
@@ -0,0 +1,23 @@
+<script module>
+	const queued = [];
+	export function push(v) {
+		return new Promise((fulfil) => {
+			queued.push(() => fulfil(v));
+		});
+	}
+</script>
+
+<script>
+	import Child from "./Child.svelte";
+
+	let show = $state(false);
+	let count = $state(0);
+</script>
+
+{#if show}
+	<Child />
+{/if}
+
+<button onclick={() => show = true}>show</button>
+<button onclick={() => queued.shift()?.()}>resolve</button>
+<button onclick={() => count++}>{count}</button>