diff --git a/src/backend/InvenTree/InvenTree/api_version.py b/src/backend/InvenTree/InvenTree/api_version.py
index 31c3f08e8a19..5ffd55540021 100644
--- a/src/backend/InvenTree/InvenTree/api_version.py
+++ b/src/backend/InvenTree/InvenTree/api_version.py
@@ -1,11 +1,14 @@
 """InvenTree API version information."""
 
 # InvenTree API version
-INVENTREE_API_VERSION = 194
+INVENTREE_API_VERSION = 195
 """Increment this API version number whenever there is a significant change to the API that any clients need to know about."""
 
 INVENTREE_API_TEXT = """
 
+v195 - 2024-05-03 : https://github.com/inventree/InvenTree/pull/7153
+    - Fixes bug in BuildOrderCancel API endpoint
+
 v194 - 2024-05-01 : https://github.com/inventree/InvenTree/pull/7147
     -  Adds field description to the currency_exchange_retrieve API call
 
diff --git a/src/backend/InvenTree/InvenTree/settings.py b/src/backend/InvenTree/InvenTree/settings.py
index 88d5af6ecbc3..2ef1fbc44c7c 100644
--- a/src/backend/InvenTree/InvenTree/settings.py
+++ b/src/backend/InvenTree/InvenTree/settings.py
@@ -284,7 +284,7 @@
     },
     'IGNORE_REQUEST_PATTERNS': ['^(?!\/(api)?(plugin)?\/).*'],
     'IGNORE_SQL_PATTERNS': [],
-    'DISPLAY_DUPLICATES': 3,
+    'DISPLAY_DUPLICATES': 1,
     'RESPONSE_HEADER': 'X-Django-Query-Count',
 }
 
diff --git a/src/backend/InvenTree/build/api.py b/src/backend/InvenTree/build/api.py
index e6e6267fe240..09926ffb237d 100644
--- a/src/backend/InvenTree/build/api.py
+++ b/src/backend/InvenTree/build/api.py
@@ -103,15 +103,35 @@ def filter_has_project_code(self, queryset, name, value):
         return queryset.filter(project_code=None)
 
 
-class BuildList(APIDownloadMixin, ListCreateAPI):
+class BuildMixin:
+    """Mixin class for Build API endpoints."""
+
+    queryset = Build.objects.all()
+    serializer_class = build.serializers.BuildSerializer
+
+    def get_queryset(self):
+        """Return the queryset for the Build API endpoints."""
+        queryset = super().get_queryset()
+
+        queryset = queryset.prefetch_related(
+            'responsible',
+            'issued_by',
+            'build_lines',
+            'build_lines__bom_item',
+            'build_lines__build',
+            'part',
+        )
+
+        return queryset
+
+
+class BuildList(APIDownloadMixin, BuildMixin, ListCreateAPI):
     """API endpoint for accessing a list of Build objects.
 
     - GET: Return list of objects (with filters)
     - POST: Create a new Build object
     """
 
-    queryset = Build.objects.all()
-    serializer_class = build.serializers.BuildSerializer
     filterset_class = BuildFilter
 
     filter_backends = SEARCH_ORDER_FILTER_ALIAS
@@ -223,12 +243,9 @@ def get_serializer(self, *args, **kwargs):
         return self.serializer_class(*args, **kwargs)
 
 
-class BuildDetail(RetrieveUpdateDestroyAPI):
+class BuildDetail(BuildMixin, RetrieveUpdateDestroyAPI):
     """API endpoint for detail view of a Build object."""
 
-    queryset = Build.objects.all()
-    serializer_class = build.serializers.BuildSerializer
-
     def destroy(self, request, *args, **kwargs):
         """Only allow deletion of a BuildOrder if the build status is CANCELLED"""
         build = self.get_object()
diff --git a/src/backend/InvenTree/build/models.py b/src/backend/InvenTree/build/models.py
index 33f54db11337..b04c26c83c8f 100644
--- a/src/backend/InvenTree/build/models.py
+++ b/src/backend/InvenTree/build/models.py
@@ -552,11 +552,12 @@ def complete_build(self, user):
         self.save()
 
         # Offload task to complete build allocations
-        InvenTree.tasks.offload_task(
+        if not InvenTree.tasks.offload_task(
             build.tasks.complete_build_allocations,
             self.pk,
             user.pk if user else None
-        )
+        ):
+            raise ValidationError(_("Failed to offload task to complete build allocations"))
 
         # Register an event
         trigger_event('build.completed', id=self.pk)
@@ -608,24 +609,29 @@ def cancel_build(self, user, **kwargs):
         - Set build status to CANCELLED
         - Save the Build object
         """
+
+        import build.tasks
+
         remove_allocated_stock = kwargs.get('remove_allocated_stock', False)
         remove_incomplete_outputs = kwargs.get('remove_incomplete_outputs', False)
 
-        # Find all BuildItem objects associated with this Build
-        items = self.allocated_stock
-
         if remove_allocated_stock:
-            for item in items:
-                item.complete_allocation(user)
+            # Offload task to remove allocated stock
+            if not InvenTree.tasks.offload_task(
+                build.tasks.complete_build_allocations,
+                self.pk,
+                user.pk if user else None
+            ):
+                raise ValidationError(_("Failed to offload task to complete build allocations"))
 
-        items.delete()
+        else:
+            self.allocated_stock.all().delete()
 
         # Remove incomplete outputs (if required)
         if remove_incomplete_outputs:
             outputs = self.build_outputs.filter(is_building=True)
 
-            for output in outputs:
-                output.delete()
+            outputs.delete()
 
         # Date of 'completion' is the date the build was cancelled
         self.completion_date = InvenTree.helpers.current_date()
diff --git a/src/backend/InvenTree/build/serializers.py b/src/backend/InvenTree/build/serializers.py
index 0ae06ef18fe0..8ce542cbf12e 100644
--- a/src/backend/InvenTree/build/serializers.py
+++ b/src/backend/InvenTree/build/serializers.py
@@ -15,14 +15,12 @@
 from rest_framework import serializers
 from rest_framework.serializers import ValidationError
 
-from sql_util.utils import SubquerySum
-
 from InvenTree.serializers import InvenTreeModelSerializer, InvenTreeAttachmentSerializer
 from InvenTree.serializers import UserSerializer
 
 import InvenTree.helpers
 from InvenTree.serializers import InvenTreeDecimalField
-from InvenTree.status_codes import BuildStatusGroups, StockStatus
+from InvenTree.status_codes import StockStatus
 
 from stock.models import generate_batch_code, StockItem, StockLocation
 from stock.serializers import StockItemSerializerBrief, LocationSerializer
@@ -589,8 +587,8 @@ def get_context_data(self):
         }
 
     remove_allocated_stock = serializers.BooleanField(
-        label=_('Remove Allocated Stock'),
-        help_text=_('Subtract any stock which has already been allocated to this build'),
+        label=_('Consume Allocated Stock'),
+        help_text=_('Consume any stock which has already been allocated to this build'),
         required=False,
         default=False,
     )
@@ -611,7 +609,7 @@ def save(self):
 
         build.cancel_build(
             request.user,
-            remove_allocated_stock=data.get('remove_unallocated_stock', False),
+            remove_allocated_stock=data.get('remove_allocated_stock', False),
             remove_incomplete_outputs=data.get('remove_incomplete_outputs', False),
         )
 
@@ -994,17 +992,24 @@ class Meta:
 
     def save(self):
         """Perform the auto-allocation step"""
+
+        import build.tasks
+        import InvenTree.tasks
+
         data = self.validated_data
 
-        build = self.context['build']
+        build_order = self.context['build']
 
-        build.auto_allocate_stock(
+        if not InvenTree.tasks.offload_task(
+            build.tasks.auto_allocate_build,
+            build_order.pk,
             location=data.get('location', None),
             exclude_location=data.get('exclude_location', None),
             interchangeable=data['interchangeable'],
             substitutes=data['substitutes'],
-            optional_items=data['optional_items'],
-        )
+            optional_items=data['optional_items']
+        ):
+            raise ValidationError(_("Failed to start auto-allocation task"))
 
 
 class BuildItemSerializer(InvenTreeModelSerializer):
diff --git a/src/backend/InvenTree/build/tasks.py b/src/backend/InvenTree/build/tasks.py
index 9464930ccd9b..b30a15f3d2d9 100644
--- a/src/backend/InvenTree/build/tasks.py
+++ b/src/backend/InvenTree/build/tasks.py
@@ -26,6 +26,18 @@
 logger = logging.getLogger('inventree')
 
 
+def auto_allocate_build(build_id: int, **kwargs):
+    """Run auto-allocation for a specified BuildOrder."""
+
+    build_order = build.models.Build.objects.filter(pk=build_id).first()
+
+    if not build_order:
+        logger.warning("Could not auto-allocate BuildOrder <%s> - BuildOrder does not exist", build_id)
+        return
+
+    build_order.auto_allocate_stock(**kwargs)
+
+
 def complete_build_allocations(build_id: int, user_id: int):
     """Complete build allocations for a specified BuildOrder."""
 
diff --git a/src/backend/InvenTree/build/test_api.py b/src/backend/InvenTree/build/test_api.py
index de8f0bbed87a..682a17e6598b 100644
--- a/src/backend/InvenTree/build/test_api.py
+++ b/src/backend/InvenTree/build/test_api.py
@@ -264,8 +264,35 @@ def test_complete(self):
         self.assertTrue(self.build.is_complete)
 
     def test_cancel(self):
-        """Test that we can cancel a BuildOrder via the API."""
-        bo = Build.objects.get(pk=1)
+        """Test that we can cancel a BuildOrder via the API.
+
+        - First test that all stock is returned to stock
+        - Second test that stock is consumed by the build order
+        """
+
+        def make_new_build(ref):
+            """Make a new build order, and allocate stock to it."""
+
+            data = self.post(
+                reverse('api-build-list'),
+                {
+                    'part': 100,
+                    'quantity': 10,
+                    'title': 'Test build',
+                    'reference': ref,
+                },
+                expected_code=201
+            ).data
+
+            build = Build.objects.get(pk=data['pk'])
+
+            build.auto_allocate_stock()
+
+            self.assertGreater(build.build_lines.count(), 0)
+
+            return build
+
+        bo = make_new_build('BO-12345')
 
         url = reverse('api-build-cancel', kwargs={'pk': bo.pk})
 
@@ -277,6 +304,23 @@ def test_cancel(self):
 
         self.assertEqual(bo.status, BuildStatus.CANCELLED)
 
+        # No items were "consumed" by this build
+        self.assertEqual(bo.consumed_stock.count(), 0)
+
+        # Make another build, this time we will *consume* the allocated stock
+        bo = make_new_build('BO-12346')
+
+        url = reverse('api-build-cancel', kwargs={'pk': bo.pk})
+
+        self.post(url, {'remove_allocated_stock': True}, expected_code=201)
+
+        bo.refresh_from_db()
+
+        self.assertEqual(bo.status, BuildStatus.CANCELLED)
+
+        # This time, there should be *consumed* stock
+        self.assertGreater(bo.consumed_stock.count(), 0)
+
     def test_delete(self):
         """Test that we can delete a BuildOrder via the API"""
         bo = Build.objects.get(pk=1)
diff --git a/src/backend/InvenTree/templates/js/translated/build.js b/src/backend/InvenTree/templates/js/translated/build.js
index 899866ae3566..e5dfa968cf18 100644
--- a/src/backend/InvenTree/templates/js/translated/build.js
+++ b/src/backend/InvenTree/templates/js/translated/build.js
@@ -974,11 +974,13 @@ function loadBuildOrderAllocationTable(table, options={}) {
                     let ref = row.build_detail?.reference ?? row.build;
                     let html = renderLink(ref, `/build/${row.build}/`);
 
-                    html += `- <small>${row.build_detail.title}</small>`;
+                    if (row.build_detail) {
+                        html += `- <small>${row.build_detail.title}</small>`;
 
-                    html += buildStatusDisplay(row.build_detail.status, {
-                        classes: 'float-right',
-                    });
+                        html += buildStatusDisplay(row.build_detail.status, {
+                            classes: 'float-right',
+                        });
+                    }
 
                     return html;
                 }
diff --git a/src/frontend/src/enums/ApiEndpoints.tsx b/src/frontend/src/enums/ApiEndpoints.tsx
index dd5fab30dacc..d92d152f8e86 100644
--- a/src/frontend/src/enums/ApiEndpoints.tsx
+++ b/src/frontend/src/enums/ApiEndpoints.tsx
@@ -52,8 +52,10 @@ export enum ApiEndpoints {
 
   // Build API endpoints
   build_order_list = 'build/',
+  build_order_cancel = 'build/:id/cancel/',
   build_order_attachment_list = 'build/attachment/',
   build_line_list = 'build/line/',
+
   bom_list = 'bom/',
 
   // Part API endpoints
diff --git a/src/frontend/src/pages/build/BuildDetail.tsx b/src/frontend/src/pages/build/BuildDetail.tsx
index fdc57276af36..3efea00a9f4d 100644
--- a/src/frontend/src/pages/build/BuildDetail.tsx
+++ b/src/frontend/src/pages/build/BuildDetail.tsx
@@ -301,6 +301,18 @@ export default function BuildDetail() {
     }
   });
 
+  const cancelBuild = useCreateApiFormModal({
+    url: apiUrl(ApiEndpoints.build_order_cancel, build.pk),
+    title: t`Cancel Build Order`,
+    fields: {
+      remove_allocated_stock: {},
+      remove_incomplete_outputs: {}
+    },
+    onFormSuccess: () => {
+      refreshInstance();
+    }
+  });
+
   const duplicateBuild = useCreateApiFormModal({
     url: ApiEndpoints.build_order_list,
     title: t`Add Build Order`,
@@ -352,7 +364,9 @@ export default function BuildDetail() {
             hidden: !user.hasChangeRole(UserRoles.build)
           }),
           CancelItemAction({
-            tooltip: t`Cancel order`
+            tooltip: t`Cancel order`,
+            onClick: () => cancelBuild.open()
+            // TODO: Hide if build cannot be cancelled
           }),
           DuplicateItemAction({
             onClick: () => duplicateBuild.open(),
@@ -379,6 +393,7 @@ export default function BuildDetail() {
     <>
       {editBuild.modal}
       {duplicateBuild.modal}
+      {cancelBuild.modal}
       <Stack spacing="xs">
         <LoadingOverlay visible={instanceQuery.isFetching} />
         <PageDetail