diff --git a/modules.json b/modules.json
index 862d3764..fc8342b4 100644
--- a/modules.json
+++ b/modules.json
@@ -12,7 +12,7 @@
 	{
 		"id": "s3",
 		"name": "S3",
-		"version": "0.1.8",
+		"version": "0.1.9",
 		"description": "S3 and S3-compatible backend support.",
 		"icon": "server",
 		"main": "https://sync.consensia.cc/modules/s3.js",
diff --git a/packages/s3/src/optimizer.ts b/packages/s3/src/optimizer.ts
index 42595d95..3efd5884 100644
--- a/packages/s3/src/optimizer.ts
+++ b/packages/s3/src/optimizer.ts
@@ -1,4 +1,4 @@
-import type { OptimizerInput, OptimizerOutput } from '@hesprs/sync-engine-sdk';
+import type { DeleteAtom, OptimizerInput, OptimizerOutput } from '@hesprs/sync-engine-sdk';
 import { digOriginal } from '@hesprs/sync-engine-sdk';
 import S3Fs, { BATCH_DELETE_MAX_KEYS } from './s3/fs';
 
@@ -9,10 +9,9 @@ export default function s3BatchDeleteOptimizer({
 	const original = digOriginal(fs);
 	if (!(original instanceof S3Fs)) return undefined;
 	const s3Fs = original;
-	type DeleteAtom = Extract<(typeof atoms)[number], { type: 'delete' }>;
 	const deleteAtoms = atoms.filter((a): a is DeleteAtom => a.type === 'delete');
+	if (deleteAtoms.length <= 1) return atoms;
 	const otherAtoms = atoms.filter((a) => a.type !== 'delete');
-	if (deleteAtoms.length === 0) return atoms;
 	const batchGroups: Array<Array<DeleteAtom>> = [];
 	for (let i = 0; i < deleteAtoms.length; i += BATCH_DELETE_MAX_KEYS)
 		batchGroups.push(deleteAtoms.slice(i, i + BATCH_DELETE_MAX_KEYS));
diff --git a/packages/s3/test/fs-s3.test.ts b/packages/s3/test/fs-s3.test.ts
index b6ef042d..3b11d0d7 100644
--- a/packages/s3/test/fs-s3.test.ts
+++ b/packages/s3/test/fs-s3.test.ts
@@ -278,6 +278,31 @@ test('batch delete rejects only atoms with S3 partial failures', async () => {
 	);
 });
 
+test('batchDelete retries each key individually when the batch request fails', async () => {
+	const s3 = createS3Fs();
+	const methods: Array<string> = [];
+	parsedResponse = { Error: { Code: 'InternalError', Message: 'boom' } };
+	s3.setRequest((url, params) => {
+		methods.push(params.method ?? '');
+		if (params.method === 'POST')
+			return response({
+				status: 500,
+				text: '<Error><Code>InternalError</Code><Message>boom</Message></Error>',
+			});
+		expect(params.method).toBe('DELETE');
+		if (url.endsWith('/broken.md'))
+			return response({
+				status: 500,
+				text: '<Error><Code>InternalError</Code><Message>boom</Message></Error>',
+			});
+		return response({ status: 204 });
+	});
+	const result = await s3.fs.batchDelete(['ok.md', 'broken.md']);
+	expect(result['ok.md']).toBe(true);
+	expect(result['broken.md']).toBe('S3 InternalError: boom');
+	expect(methods).toStrictEqual(['POST', 'DELETE', 'DELETE']);
+});
+
 test('move copies encoded source before deleting old key', async () => {
 	const s3 = createS3Fs();
 	s3.setRequest((url, params) => {