diff --git a/lms/djangoapps/course_home_api/outline/views.py b/lms/djangoapps/course_home_api/outline/views.py
index 1d02261dbc0c..f116ce1092b6 100644
--- a/lms/djangoapps/course_home_api/outline/views.py
+++ b/lms/djangoapps/course_home_api/outline/views.py
@@ -56,7 +56,11 @@
     get_current_update_for_user
 )
 from openedx.features.course_experience.url_helpers import get_learning_mfe_home_url
-from openedx.features.course_experience.utils import get_course_outline_block_tree, get_start_block
+from openedx.features.course_experience.utils import (
+    get_course_outline_block_tree,
+    get_course_outline_block_tree_with_cache,
+    get_start_block
+)
 from openedx.features.discounts.utils import generate_offer_data
 from xmodule.course_block import COURSE_VISIBILITY_PUBLIC, COURSE_VISIBILITY_PUBLIC_OUTLINE  # lint-amnesty, pylint: disable=wrong-import-order
 
@@ -243,7 +247,7 @@ def get(self, request, *args, **kwargs):  # pylint: disable=too-many-statements
         show_enrolled = is_enrolled or is_staff
         enable_proctored_exams = False
         if show_enrolled:
-            course_blocks = get_course_outline_block_tree(request, course_key_string, request.user)
+            course_blocks = get_course_outline_block_tree_with_cache(request, course_key_string, request.user)
             date_blocks = get_course_date_blocks(course, request.user, request, num_assignments=1)
             dates_widget['course_date_blocks'] = [block for block in date_blocks if not isinstance(block, TodaysDate)]
 
@@ -278,7 +282,7 @@ def get(self, request, *args, **kwargs):  # pylint: disable=too-many-statements
                 resume_course['url'] = start_block['lms_web_url']
 
         elif allow_public_outline or allow_public or user_is_masquerading:
-            course_blocks = get_course_outline_block_tree(request, course_key_string, None)
+            course_blocks = get_course_outline_block_tree_with_cache(request, course_key_string, None)
             if allow_public or user_is_masquerading:
                 handouts_html = get_course_info_section(request, request.user, course, 'handouts')
 
@@ -416,7 +420,7 @@ class CourseNavigationBlocksView(RetrieveAPIView):
 
     serializer_class = CourseBlockSerializer
     COURSE_BLOCKS_CACHE_KEY_TEMPLATE = (
-        'course_sidebar_blocks_{course_key_string}_{course_version}_{user_id}_{user_cohort_id}'
+        'course_sidebar_blocks_{course_key_string}_{course_edited_timestamp}_{user_id}_{user_cohort_id}'
         '_{enrollment_mode}_{allow_public}_{allow_public_outline}_{is_masquerading}'
     )
     COURSE_BLOCKS_CACHE_TIMEOUT = 60 * 60  # 1 hour
@@ -451,7 +455,7 @@ def get(self, request, *args, **kwargs):
 
         cache_key = self.COURSE_BLOCKS_CACHE_KEY_TEMPLATE.format(
             course_key_string=course_key_string,
-            course_version=str(course.course_version),
+            course_edited_timestamp=str(course.subtree_edited_on.timestamp()),
             user_id=request.user.id,
             enrollment_mode=getattr(enrollment, 'mode', ''),
             user_cohort_id=getattr(user_cohort, 'id', ''),
diff --git a/lms/djangoapps/courseware/toggles.py b/lms/djangoapps/courseware/toggles.py
index 4aadfd3e93ed..65e7d4718d91 100644
--- a/lms/djangoapps/courseware/toggles.py
+++ b/lms/djangoapps/courseware/toggles.py
@@ -68,7 +68,7 @@
     f'{WAFFLE_FLAG_NAMESPACE}.mfe_courseware_search', __name__
 )
 
-# .. toggle_name: courseware.navigation_sidebar_blocks_caching
+# .. toggle_name: courseware.disable_navigation_sidebar_blocks_caching
 # .. toggle_implementation: WaffleFlag
 # .. toggle_default: False
 # .. toggle_description: Disable caching of navigation sidebar blocks on Learning MFE.
diff --git a/openedx/features/course_experience/utils.py b/openedx/features/course_experience/utils.py
index 4675d0a974e0..44170cff4998 100644
--- a/openedx/features/course_experience/utils.py
+++ b/openedx/features/course_experience/utils.py
@@ -15,6 +15,17 @@
 
 
 @request_cached()
+def get_course_outline_block_tree_with_cache(request, course_id, user=None, allow_start_dates_in_future=False):
+    """
+    Returns the root block of the course outline, with children as blocks.
+
+    allow_start_dates_in_future (bool): When True, will allow blocks to be
+    returned that can bypass the StartDateTransformer's filter to show
+    blocks with start dates in the future.
+    """
+    return get_course_outline_block_tree(request, course_id, user, allow_start_dates_in_future)
+
+
 def get_course_outline_block_tree(request, course_id, user=None, allow_start_dates_in_future=False):  # lint-amnesty, pylint: disable=too-many-statements
     """
     Returns the root block of the course outline, with children as blocks.