diff --git a/rdmo/projects/progress.py b/rdmo/projects/progress.py
index 01036cace..ce03d340b 100644
--- a/rdmo/projects/progress.py
+++ b/rdmo/projects/progress.py
@@ -49,6 +49,13 @@ def compute_sets(values):
 
 def compute_next_relevant_page(current_page, direction, catalog, resolved_conditions):
     # compute the next relevant page based on resolved conditions.
+
+    # Determine the next page based on the specified direction
+    next_page = (
+        catalog.get_prev_page(current_page) if direction == 'prev'
+        else catalog.get_next_page(current_page)
+    )
+
     # If no current_page, return None
     if not current_page:
         return None
@@ -57,12 +64,6 @@ def compute_next_relevant_page(current_page, direction, catalog, resolved_condit
     if compute_show_page(current_page, resolved_conditions):
         return current_page
 
-    # Determine the next page based on the specified direction
-    next_page = (
-        catalog.get_prev_page(current_page) if direction == 'prev'
-        else catalog.get_next_page(current_page)
-    )
-
     # Recursive step: Check the next page
     return compute_next_relevant_page(next_page, direction, catalog, resolved_conditions)
 
diff --git a/rdmo/projects/tests/test_viewset_project_page.py b/rdmo/projects/tests/test_viewset_project_page.py
index 8a6b326f4..228ee2e3d 100644
--- a/rdmo/projects/tests/test_viewset_project_page.py
+++ b/rdmo/projects/tests/test_viewset_project_page.py
@@ -112,12 +112,14 @@ def test_detail_page_resolve_next_relevant_page(db, client, direction):
     response = client.get(f'{url}{add_url}')
     assert response.status_code == 200
     assert response.json().get(f'{direction}_page') == next_page_id
+
     # get the following page, depending on direction
     url_next = reverse(urlnames['detail'], args=[project_id, next_page_id])
     response_next = client.get(f'{url_next}{add_url}')
     assert response_next.status_code == 303
+
     # this should show the redirect to the next relevant page
-    assert response_next.url.endswith(f'{end_page_id}/{add_url}')
+    assert response_next.url.endswith(f'{end_page_id}/')
 
     # a get on the redirected url as a double check
     response_next_relevant = client.get(response_next.url)
diff --git a/rdmo/projects/viewsets.py b/rdmo/projects/viewsets.py
index b01a3b992..4d52e3bb6 100644
--- a/rdmo/projects/viewsets.py
+++ b/rdmo/projects/viewsets.py
@@ -21,7 +21,7 @@
 
 from rdmo.conditions.models import Condition
 from rdmo.core.permissions import HasModelPermission
-from rdmo.core.utils import human2bytes, return_file_response
+from rdmo.core.utils import human2bytes, is_truthy, return_file_response
 from rdmo.options.models import OptionSet
 from rdmo.questions.models import Catalog, Page, Question, QuestionSet
 from rdmo.tasks.models import Task
@@ -540,15 +540,13 @@ def retrieve(self, request, *args, **kwargs):
             return Response(serializer.data)
         else:
             # determine the direction of navigation (previous or next)
-            direction = 'prev' if request.GET.get('back') == 'true' else 'next'
+            direction = 'prev' if is_truthy(request.GET.get('back')) else 'next'
 
             # find the next relevant page with from pages and resolved conditions
-            next_page = compute_next_relevant_page(page, direction, catalog, resolved_conditions)
+            next_relevant_page = compute_next_relevant_page(page, direction, catalog, resolved_conditions)
 
-            if next_page is not None:
-                url = reverse('v1-projects:project-page-detail', args=[self.project.id, next_page.id])
-                if direction == 'prev':
-                    url += '?back=true'
+            if next_relevant_page is not None:
+                url = reverse('v1-projects:project-page-detail', args=[self.project.id, next_relevant_page.id])
                 return HttpResponseRedirect(url, status=303)
 
             # end of catalog, if no next relevant page is found