diff --git a/confluence-mdx/bin/reverse_sync/patch_builder.py b/confluence-mdx/bin/reverse_sync/patch_builder.py
index 252e42cf4..784c38125 100644
--- a/confluence-mdx/bin/reverse_sync/patch_builder.py
+++ b/confluence-mdx/bin/reverse_sync/patch_builder.py
@@ -19,7 +19,9 @@
     sha256_text,
     SidecarEntry,
     build_mdx_line_range_index,
+    build_list_all_anchor_entries,
 )
+from reverse_sync.xhtml_normalizer import extract_plain_text
 from reverse_sync.lost_info_patcher import apply_lost_info, distribute_lost_info_to_mappings
 from reverse_sync.mdx_to_xhtml_inline import mdx_block_to_xhtml_element, mdx_block_to_inner_xhtml
 from mdx_to_storage.inline import convert_inline
@@ -1140,19 +1142,46 @@ def _mark_used(block_id: str, m: BlockMapping):
                 and (roundtrip_sidecar is not None or has_any_change)
                 and (list_sidecar is None or mapping_via_v3_fallback or has_any_change)
             )
+            # preserved anchor list (ac:image 포함, ac:link 미포함) without sidecar reconstruction:
+            # collapse_ws 후 old/new가 동일한 경우(마커 공백만 변경) text-level 패치가 no-op이 되므로
+            # mapping의 XHTML에서 anchor entries를 추출하여 synthetic reconstruction으로 재생성
+            should_replace_preserved_anchor_list = False
+            synthetic_list_sidecar: Optional[SidecarBlock] = None
+            _marker_ws_only = has_content_change and _old_plain == _new_plain
+            if (mapping is not None
+                    and _marker_ws_only
+                    and _contains_preserved_anchor_markup(mapping.xhtml_text)
+                    and not _contains_preserved_link_markup(mapping.xhtml_text)
+                    and not sidecar_block_requires_reconstruction(list_sidecar)):
+                anchor_items = build_list_all_anchor_entries(mapping.xhtml_text)
+                if anchor_items:
+                    synthetic_list_sidecar = SidecarBlock(
+                        block_index=0,
+                        xhtml_xpath=mapping.xhtml_xpath,
+                        xhtml_fragment=mapping.xhtml_text,
+                        reconstruction={
+                            'kind': 'list',
+                            'old_plain_text': extract_plain_text(mapping.xhtml_text),
+                            'ordered': mapping.xhtml_xpath.startswith('ol['),
+                            'items': anchor_items,
+                        },
+                    )
+                    should_replace_preserved_anchor_list = True
             if (mapping is not None
                     and (
                         # anchor case: sidecar anchor metadata가 있으면 ac: 포함 여부 무관
                         sidecar_block_requires_reconstruction(list_sidecar)
                         # clean case: preserved anchor 없는 clean list
                         or should_replace_clean_list
+                        # preserved anchor list (ac:image only): synthetic sidecar로 재생성
+                        or should_replace_preserved_anchor_list
                     )):
                 _mark_used(mapping.block_id, mapping)
                 patches.append(
                     _build_replace_fragment_patch(
                         mapping,
                         change.new_block,
-                        sidecar_block=list_sidecar,
+                        sidecar_block=synthetic_list_sidecar if should_replace_preserved_anchor_list else list_sidecar,
                         mapping_lost_info=mapping_lost_info,
                     )
                 )
diff --git a/confluence-mdx/bin/reverse_sync/sidecar.py b/confluence-mdx/bin/reverse_sync/sidecar.py
index 3e037a911..a4c4b13fd 100644
--- a/confluence-mdx/bin/reverse_sync/sidecar.py
+++ b/confluence-mdx/bin/reverse_sync/sidecar.py
@@ -371,7 +371,41 @@ def _walk_list(list_el, path: list, entries: list) -> None:
                 _walk_list(child, current_path, entries)
 
 
-def _build_list_anchor_entries(fragment: str) -> list:
+def _walk_list_all_anchors(list_el, path: list, entries: list) -> None:
+    """list 요소를 재귀 순회하며 li 직접 자식 ac:image도 포함하여 anchor entry를 수집한다.
+
+    _walk_list는 p 내부 ac:image만 수집하지만, 이 함수는 li의 직접 자식
+    ac:image도 수집하여 synthetic reconstruction에 사용한다.
+    """
+    from bs4 import NavigableString, Tag
+    items = [c for c in list_el.children if isinstance(c, Tag) and c.name == 'li']
+    for idx, li in enumerate(items):
+        current_path = path + [idx]
+        li_text_offset = 0
+        for child in li.children:
+            if isinstance(child, NavigableString):
+                li_text_offset += len(str(child).strip())
+                continue
+            if not isinstance(child, Tag):
+                continue
+            if child.name == 'p':
+                for a in _extract_anchors_from_p(child):
+                    entries.append({**a, 'path': current_path})
+                li_text_offset += len(extract_plain_text(str(child)))
+            elif child.name == 'ac:image':
+                entries.append({
+                    'kind': 'image',
+                    'offset': li_text_offset,
+                    'raw_xhtml': str(child),
+                    'path': current_path,
+                })
+            elif child.name in ('ul', 'ol'):
+                _walk_list_all_anchors(child, current_path, entries)
+            else:
+                li_text_offset += len(extract_plain_text(str(child)))
+
+
+def build_list_anchor_entries(fragment: str) -> list:
     """list fragment 내 li > p > ac:image를 path 기반 anchor entry로 추출한다.
 
     각 entry:
@@ -390,6 +424,22 @@ def _build_list_anchor_entries(fragment: str) -> list:
     return entries
 
 
+def build_list_all_anchor_entries(fragment: str) -> list:
+    """list fragment 내 모든 ac:image를 anchor entry로 추출한다.
+
+    build_list_anchor_entries와 달리 li 직접 자식 ac:image도 포함한다.
+    synthetic reconstruction 생성 시 사용한다.
+    """
+    from bs4 import BeautifulSoup
+    soup = BeautifulSoup(fragment, 'html.parser')
+    root = soup.find(['ul', 'ol'])
+    if root is None:
+        return []
+    entries = []
+    _walk_list_all_anchors(root, [], entries)
+    return entries
+
+
 def _build_reconstruction_metadata(
     fragment: str,
     mapping: BlockMapping | None,
@@ -406,7 +456,7 @@ def _build_reconstruction_metadata(
         metadata["anchors"] = _build_anchor_entries(fragment)
     elif mapping.type == "list":
         metadata["ordered"] = mapping.xhtml_xpath.startswith("ol[")
-        metadata["items"] = _build_list_anchor_entries(fragment)
+        metadata["items"] = build_list_anchor_entries(fragment)
     elif mapping.children:
         children_meta = []
         for child_id in mapping.children:
@@ -430,7 +480,7 @@ def _build_reconstruction_metadata(
                 if anchors:
                     child_data["anchors"] = anchors
             elif child_m.type == "list":
-                items = _build_list_anchor_entries(child_m.xhtml_text)
+                items = build_list_anchor_entries(child_m.xhtml_text)
                 if items:
                     child_data["items"] = items
             children_meta.append(child_data)
diff --git a/confluence-mdx/tests/test_reverse_sync_patch_builder.py b/confluence-mdx/tests/test_reverse_sync_patch_builder.py
index ef32f8ac6..ce9ed6c4f 100644
--- a/confluence-mdx/tests/test_reverse_sync_patch_builder.py
+++ b/confluence-mdx/tests/test_reverse_sync_patch_builder.py
@@ -2967,6 +2967,105 @@ def test_image_anchor_list_keeps_collapsed_text_diff(self):
         )
         assert patches[0]['new_plain_text'] == '목록 좌측 상단에서 Delete 버튼을 클릭합니다.'
 
+    def test_image_anchor_list_marker_ws_only_produces_replace_fragment(self):
+        """마커 뒤 공백만 변경된 이미지 preserved anchor 리스트도 replace_fragment 패치를 생성한다."""
+        xhtml = (
+            '<ol><li><p>목록 좌측 상단에서 Delete 버튼을 클릭합니다.</p>'
+            '<ac:image ac:align="center">'
+            '<ri:attachment ri:filename="delete.png"></ri:attachment>'
+            '</ac:image><p> </p></li></ol>'
+        )
+        old_content = (
+            '4.  목록 좌측 상단에서 Delete 버튼을 클릭합니다.<br/>\n'
+            '  <figure data-layout="center" data-align="center">\n'
+            '  <img src="/delete.png" alt="img" width="736" />\n'
+            '  </figure>\n'
+        )
+        new_content = (
+            '4. 목록 좌측 상단에서 Delete 버튼을 클릭합니다.<br/>\n'
+            '  <figure data-layout="center" data-align="center">\n'
+            '  <img src="/delete.png" alt="img" width="736" />\n'
+            '  </figure>\n'
+        )
+        change = _make_change(0, old_content, new_content, type_='list')
+        mapping = BlockMapping(
+            block_id='list-image-ws-1',
+            type='list',
+            xhtml_xpath='ol[1]',
+            xhtml_text=xhtml,
+            xhtml_plain_text='목록 좌측 상단에서 Delete 버튼을 클릭합니다.',
+            xhtml_element_index=0,
+            children=[],
+        )
+        roundtrip_sidecar = _make_roundtrip_sidecar([
+            SidecarBlock(0, 'ol[1]', xhtml, sha256_text(old_content), (1, 4))
+        ])
+
+        patches, _, skipped = build_patches(
+            [change], [change.old_block], [change.new_block],
+            mappings=[mapping],
+            roundtrip_sidecar=roundtrip_sidecar,
+        )
+
+        assert len(patches) == 1, (
+            f"마커 공백만 변경된 이미지 preserved anchor 리스트도 패치를 생성해야 합니다. "
+            f"skipped={skipped}"
+        )
+        assert patches[0].get('action') == 'replace_fragment', (
+            f"preserved anchor 리스트는 replace_fragment 패치여야 합니다: {patches[0]}"
+        )
+        new_xhtml = patches[0]['new_element_xhtml']
+        assert '<ac:image' in new_xhtml, (
+            f"replace_fragment에 ac:image가 보존되어야 합니다: {new_xhtml}"
+        )
+        assert 'Delete 버튼을 클릭합니다.' in new_xhtml
+
+    def test_image_anchor_list_marker_ws_patch_xhtml_e2e(self):
+        """마커 공백 변경 → build_patches → patch_xhtml 전 과정 E2E 검증."""
+        xhtml = (
+            '<ol><li><p>좌측 상단에서 Delete 버튼을 클릭합니다.</p>'
+            '<ac:image ac:align="center">'
+            '<ri:attachment ri:filename="del.png"></ri:attachment>'
+            '</ac:image><p> </p></li></ol>'
+        )
+        old_content = (
+            '4.  좌측 상단에서 Delete 버튼을 클릭합니다.<br/>\n'
+            '  <figure data-layout="center" data-align="center">\n'
+            '  <img src="/del.png" alt="img" width="736" />\n'
+            '  </figure>\n'
+        )
+        new_content = (
+            '4. 좌측 상단에서 Delete 버튼을 클릭합니다.<br/>\n'
+            '  <figure data-layout="center" data-align="center">\n'
+            '  <img src="/del.png" alt="img" width="736" />\n'
+            '  </figure>\n'
+        )
+        change = _make_change(0, old_content, new_content, type_='list')
+        mapping = BlockMapping(
+            block_id='list-img-e2e',
+            type='list',
+            xhtml_xpath='ol[1]',
+            xhtml_text=xhtml,
+            xhtml_plain_text='좌측 상단에서 Delete 버튼을 클릭합니다.',
+            xhtml_element_index=0,
+            children=[],
+        )
+        roundtrip_sidecar = _make_roundtrip_sidecar([
+            SidecarBlock(0, 'ol[1]', xhtml, sha256_text(old_content), (1, 4))
+        ])
+
+        patches, _, skipped = build_patches(
+            [change], [change.old_block], [change.new_block],
+            mappings=[mapping],
+            roundtrip_sidecar=roundtrip_sidecar,
+        )
+
+        assert len(patches) == 1, f"패치가 생성되어야 합니다. skipped={skipped}"
+        # patch_xhtml 적용하여 XHTML이 실제로 갱신되는지 확인
+        patched = patch_xhtml(xhtml, patches)
+        assert '<ac:image' in patched, f"ac:image가 보존되어야 합니다: {patched}"
+        assert 'Delete 버튼을 클릭합니다.' in patched, f"텍스트가 유지되어야 합니다: {patched}"
+
 
 # ── _normalize_list_for_content_compare 마커 공백 보존 테스트 ──