diff --git a/confluence-mdx/bin/reverse_sync/reconstructors.py b/confluence-mdx/bin/reverse_sync/reconstructors.py
index d6f11e3f2..868b23e43 100644
--- a/confluence-mdx/bin/reverse_sync/reconstructors.py
+++ b/confluence-mdx/bin/reverse_sync/reconstructors.py
@@ -379,6 +379,40 @@ def _reconstruct_child_with_anchors(child_frag: str, child_meta: dict) -> str:
     return str(soup)
 
 
+def _find_container_body(root: Tag) -> Optional[Tag]:
+    """Container fragment에서 child slot이 들어가는 body wrapper를 찾는다."""
+    return root.find('ac:rich-text-body') or root.find('ac:adf-content')
+
+
+def _replace_container_body_children(body: Tag, children: list[str]) -> None:
+    """Container body의 직계 child를 새 fragment 목록으로 교체한다."""
+    for child in list(body.contents):
+        child.extract()
+    for fragment in children:
+        fragment_soup = BeautifulSoup(fragment, 'html.parser')
+        for child in list(fragment_soup.contents):
+            body.append(child.extract())
+
+
+def _find_adf_fallback_body(root: Tag) -> Optional[Tag]:
+    """ac:adf-extension 내부 fallback content slot을 찾는다."""
+    fallback = root.find('ac:adf-fallback')
+    if fallback is None:
+        return None
+    panel_content = fallback.find(
+        'div',
+        class_=lambda value: isinstance(value, str) and 'panelContent' in value.split(),
+    )
+    if panel_content is not None:
+        return panel_content
+    return fallback.find('div') or fallback
+
+
+def _fragments_contain_confluence_markup(fragments: list[str]) -> bool:
+    """fallback에 그대로 복사하기 unsafe한 Confluence 전용 markup이 있으면 True."""
+    return any('<ac:' in fragment or '<ri:' in fragment for fragment in fragments)
+
+
 def sidecar_block_requires_reconstruction(
     sidecar_block: Optional['SidecarBlock'],
 ) -> bool:
@@ -451,7 +485,6 @@ def reconstruct_container_fragment(
 ) -> str:
     """Container (callout/ADF panel) fragment에 sidecar child 메타데이터로 재구성한다.
 
-    anchor 없는 clean container는 stored XHTML를 template으로 텍스트만 업데이트한다.
     anchor가 있어 재구성이 트리거된 경우 아래 세 단계를 각 child에 적용한다:
     1. inline markup 보존: 원본 fragment를 template으로 bold·italic·link 유지
     2. anchor 재삽입: ac:image를 offset 매핑으로 복원
@@ -542,28 +575,35 @@ def _apply_outer_wrapper_template(
     """
     outer_template = sidecar_block.xhtml_fragment
     template_soup = BeautifulSoup(outer_template or new_fragment, 'html.parser')
-    template_body = (
-        template_soup.find('ac:rich-text-body') or template_soup.find('ac:adf-content')
-    )
+    template_root = next((child for child in template_soup.contents if isinstance(child, Tag)), None)
+    if template_root is None:
+        return new_fragment
+    template_body = _find_container_body(template_root)
     if template_body is None:
         return new_fragment
 
     # body children 추출
     if rebuilt_children is None:
         emitted_soup = BeautifulSoup(new_fragment, 'html.parser')
-        emitted_body = (
-            emitted_soup.find('ac:rich-text-body') or emitted_soup.find('ac:adf-content')
-        )
+        emitted_root = next((child for child in emitted_soup.contents if isinstance(child, Tag)), None)
+        if emitted_root is None:
+            return new_fragment
+        emitted_body = _find_container_body(emitted_root)
         if emitted_body is None:
             return new_fragment
         rebuilt_children = [str(c) for c in emitted_body.children if isinstance(c, Tag)]
 
-    for child in list(template_body.contents):
-        child.extract()
-    for frag in rebuilt_children:
-        frag_soup = BeautifulSoup(frag, 'html.parser')
-        for node in list(frag_soup.contents):
-            template_body.append(node.extract())
+    _replace_container_body_children(template_body, rebuilt_children)
+
+    if template_root.name == 'ac:adf-extension':
+        fallback_body = _find_adf_fallback_body(template_root)
+        if fallback_body is not None:
+            if _fragments_contain_confluence_markup(rebuilt_children):
+                fallback = template_root.find('ac:adf-fallback')
+                if fallback is not None:
+                    fallback.decompose()
+            else:
+                _replace_container_body_children(fallback_body, rebuilt_children)
 
     return str(template_soup)
 
diff --git a/confluence-mdx/tests/test_reverse_sync_reconstruct_container.py b/confluence-mdx/tests/test_reverse_sync_reconstruct_container.py
index 075702865..abe04ab5c 100644
--- a/confluence-mdx/tests/test_reverse_sync_reconstruct_container.py
+++ b/confluence-mdx/tests/test_reverse_sync_reconstruct_container.py
@@ -364,6 +364,52 @@ def test_no_sidecar_block_returns_new_fragment(self):
         result = reconstruct_container_fragment(new_frag, None)
         assert result == new_frag
 
+    def test_anchor_bearing_adf_container_drops_stale_fallback(self):
+        """Confluence 전용 anchor가 들어가면 fallback은 stale 상태로 남기지 않는다."""
+        new_frag = (
+            '<ac:structured-macro ac:name="note">'
+            '<ac:rich-text-body><p>Updated note.</p></ac:rich-text-body>'
+            '</ac:structured-macro>'
+        )
+        image_xhtml = (
+            '<ac:image ac:inline="true">'
+            '<ri:attachment ri:filename="sample.png"/>'
+            '</ac:image>'
+        )
+        block = SidecarBlock(
+            block_index=0,
+            xhtml_xpath='ac:adf-extension[1]',
+            xhtml_fragment=(
+                '<ac:adf-extension><ac:adf-node type="panel">'
+                '<ac:adf-attribute key="panel-type">note</ac:adf-attribute>'
+                '<ac:adf-content><p>Original note.</p></ac:adf-content>'
+                '</ac:adf-node>'
+                '<ac:adf-fallback><div class="panel"><div class="panelContent">'
+                '<p>Original fallback.</p>'
+                '</div></div></ac:adf-fallback>'
+                '</ac:adf-extension>'
+            ),
+            reconstruction={
+                'kind': 'container',
+                'children': [
+                    {
+                        'xpath': 'ac:adf-extension[1]/p[1]',
+                        'fragment': f'<p>Original {image_xhtml} note.</p>',
+                        'plain_text': 'Original note.',
+                        'type': 'paragraph',
+                        'anchors': [{'offset': 9, 'raw_xhtml': image_xhtml}],
+                    }
+                ],
+                'child_xpaths': ['ac:adf-extension[1]/p[1]'],
+            },
+        )
+
+        result = reconstruct_container_fragment(new_frag, block)
+
+        assert '<ac:image' in result
+        assert '<ac:adf-fallback>' not in result
+        assert 'Original fallback.' not in result
+
 
 @pytest.mark.parametrize("page_id", ['544112828', '1454342158', '544379140', 'panels'])
 def test_container_child_fragment_oracle(page_id):
@@ -504,6 +550,47 @@ def test_clean_callout_uses_transfer_text_changes(self):
         )
         assert 'Updated text' in patched
 
+    def test_adf_panel_with_anchor_preserves_adf_wrapper(self):
+        """ADF panel 재구성 시 wrapper를 유지하고 stale fallback을 제거한다."""
+        xhtml = (
+            '<ac:adf-extension><ac:adf-node type="panel">'
+            '<ac:adf-attribute key="panel-type">note</ac:adf-attribute>'
+            '<ac:adf-content>'
+            '<p>Original <ac:image ac:inline="true">'
+            '<ri:attachment ri:filename="sample.png"/>'
+            '</ac:image> note.</p>'
+            '</ac:adf-content>'
+            '</ac:adf-node>'
+            '<ac:adf-fallback><div class="panel"><div class="panelContent">'
+            '<p>Original note.</p>'
+            '</div></div></ac:adf-fallback>'
+            '</ac:adf-extension>'
+        )
+        original_mdx = (
+            'import { Callout } from "nextra/components"\n\n'
+            '<Callout type="important">\n'
+            'Original <img src="/sample.png" alt="sample.png"/> note.\n'
+            '</Callout>\n'
+        )
+        improved_mdx = (
+            'import { Callout } from "nextra/components"\n\n'
+            '<Callout type="important">\n'
+            'Updated <img src="/sample.png" alt="sample.png"/> note.\n'
+            '</Callout>\n'
+        )
+
+        patches, patched = _run_pipeline(xhtml, original_mdx, improved_mdx)
+
+        replace_patches = [p for p in patches if p.get('action') == 'replace_fragment']
+        assert len(replace_patches) == 1
+        assert replace_patches[0]['xhtml_xpath'] == 'ac:adf-extension[1]'
+        assert '<ac:adf-extension>' in patched
+        assert '<ac:structured-macro ac:name="note">' not in patched
+        assert '<ac:image' in patched
+        # ac: markup 포함 시 stale fallback은 제거되어야 한다
+        assert '<ac:adf-fallback>' not in patched
+        assert 'Original note.' not in patched
+
     def test_clean_callout_structure_change_keeps_emitted_list(self):
         """clean container의 구조 변경은 stored paragraph 템플릿으로 덮어쓰면 안 된다."""
         sidecar_block = SidecarBlock(