diff --git a/CHANGELOG.md b/CHANGELOG.md
index 440e92fd4b..32983464c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,10 @@ and this project adheres to
 
 ### Fixed
 
+- The breadcrumb project picker now shows the full ancestor path on the project
+  settings page (previously it collapsed to the sandbox's own name).
+  [#4769](https://github.com/OpenFn/lightning/issues/4769)
+
 ## [2.16.4-pre] - 2026-05-18
 
 ### Added
diff --git a/lib/lightning_web/components/layout_components.ex b/lib/lightning_web/components/layout_components.ex
index e4351604fe..fa2b1dde99 100644
--- a/lib/lightning_web/components/layout_components.ex
+++ b/lib/lightning_web/components/layout_components.ex
@@ -305,7 +305,7 @@ defmodule LightningWeb.LayoutComponents do
   ## Example
 
       <.breadcrumbs>
-        <.breadcrumb_project_picker project={@project} current_user={@current_user} access_root={@access_root} />
+        <.breadcrumb_project_picker project={@project} label={@project_label} />
         <.breadcrumb_items items={[{"History", "/projects/\#{@project}/history"}]} />
         <.breadcrumb>
           <:label>{@page_title}</:label>
@@ -356,32 +356,15 @@ defmodule LightningWeb.LayoutComponents do
   LiveView pages and the collaborative editor.
   """
   attr :project, Lightning.Projects.Project, required: true
-  attr :current_user, Lightning.Accounts.User, default: nil
-  attr :access_root, Lightning.Projects.Project, default: nil
+  attr :label, :string, required: true
 
   def breadcrumb_project_picker(assigns) do
-    alias Lightning.Projects
-    alias Lightning.Projects.Project
-
-    access_root =
-      case {assigns[:access_root], assigns[:current_user]} do
-        {%Project{} = ar, _} ->
-          ar
-
-        {nil, %Lightning.Accounts.User{} = user} ->
-          Projects.access_root_for_user(assigns.project, user)
-
-        _ ->
-          assigns.project
-      end
-
     assigns =
       assigns
       |> assign(
-        :label,
-        Projects.display_name_within_access_root(assigns.project, access_root)
+        :is_sandbox,
+        to_string(Lightning.Projects.Project.sandbox?(assigns.project))
       )
-      |> assign(:is_sandbox, to_string(Project.sandbox?(assigns.project)))
       |> assign(:color, assigns.project.color)
 
     ~H"""
diff --git a/lib/lightning_web/hooks.ex b/lib/lightning_web/hooks.ex
index e83368163e..56813d3268 100644
--- a/lib/lightning_web/hooks.ex
+++ b/lib/lightning_web/hooks.ex
@@ -58,12 +58,19 @@ defmodule LightningWeb.Hooks do
         access_root =
           Lightning.Projects.access_root_for_user(project, current_user)
 
+        project_label =
+          Lightning.Projects.display_name_within_access_root(
+            project,
+            access_root
+          )
+
         {:cont,
          socket
          |> assign(:side_menu_theme, "primary-theme")
          |> assign(:project_user, project_user)
          |> assign(:project, project)
          |> assign(:access_root, access_root)
+         |> assign(:project_label, project_label)
          |> assign(:projects, projects)}
 
       true ->
diff --git a/lib/lightning_web/live/channel_live/index.ex b/lib/lightning_web/live/channel_live/index.ex
index 5c3a136fc0..230b180022 100644
--- a/lib/lightning_web/live/channel_live/index.ex
+++ b/lib/lightning_web/live/channel_live/index.ex
@@ -30,8 +30,7 @@ defmodule LightningWeb.ChannelLive.Index do
             <LayoutComponents.breadcrumbs>
               <LayoutComponents.breadcrumb_project_picker
                 project={@project}
-                current_user={@current_user}
-                access_root={@access_root}
+                label={@project_label}
               />
               <LayoutComponents.breadcrumb>
                 <:label>{@page_title}</:label>
diff --git a/lib/lightning_web/live/channel_request_live/show.ex b/lib/lightning_web/live/channel_request_live/show.ex
index ec8de68109..cee507489b 100644
--- a/lib/lightning_web/live/channel_request_live/show.ex
+++ b/lib/lightning_web/live/channel_request_live/show.ex
@@ -57,8 +57,7 @@ defmodule LightningWeb.ChannelRequestLive.Show do
             <LayoutComponents.breadcrumbs>
               <LayoutComponents.breadcrumb_project_picker
                 project={@project}
-                current_user={@current_user}
-                access_root={@access_root}
+                label={@project_label}
               />
               <LayoutComponents.breadcrumb_items items={[
                 {"History", ~p"/projects/#{@project}/history"},
diff --git a/lib/lightning_web/live/dataclip_live/show.ex b/lib/lightning_web/live/dataclip_live/show.ex
index 14cb535021..844872493e 100644
--- a/lib/lightning_web/live/dataclip_live/show.ex
+++ b/lib/lightning_web/live/dataclip_live/show.ex
@@ -42,8 +42,7 @@ defmodule LightningWeb.DataclipLive.Show do
             <LayoutComponents.breadcrumbs>
               <LayoutComponents.breadcrumb_project_picker
                 project={@project}
-                current_user={@current_user}
-                access_root={@access_root}
+                label={@project_label}
               />
               <LayoutComponents.breadcrumb>
                 <:label>
diff --git a/lib/lightning_web/live/project_live/settings.html.heex b/lib/lightning_web/live/project_live/settings.html.heex
index f7b4cee0a7..711dbdb27b 100644
--- a/lib/lightning_web/live/project_live/settings.html.heex
+++ b/lib/lightning_web/live/project_live/settings.html.heex
@@ -10,7 +10,10 @@
     <LayoutComponents.header current_user={@current_user}>
       <:breadcrumbs>
         <LayoutComponents.breadcrumbs>
-          <LayoutComponents.breadcrumb_project_picker project={@project} />
+          <LayoutComponents.breadcrumb_project_picker
+            project={@project}
+            label={@project_label}
+          />
           <LayoutComponents.breadcrumb>
             <:label>{@page_title}</:label>
           </LayoutComponents.breadcrumb>
diff --git a/lib/lightning_web/live/run_live/index.html.heex b/lib/lightning_web/live/run_live/index.html.heex
index 1325dec924..6a92211159 100644
--- a/lib/lightning_web/live/run_live/index.html.heex
+++ b/lib/lightning_web/live/run_live/index.html.heex
@@ -12,8 +12,7 @@
         <LayoutComponents.breadcrumbs>
           <LayoutComponents.breadcrumb_project_picker
             project={@project}
-            current_user={@current_user}
-            access_root={@access_root}
+            label={@project_label}
           />
           <LayoutComponents.breadcrumb>
             <:label>{@page_title}</:label>
diff --git a/lib/lightning_web/live/run_live/show.ex b/lib/lightning_web/live/run_live/show.ex
index b25d8623a5..56e8c62add 100644
--- a/lib/lightning_web/live/run_live/show.ex
+++ b/lib/lightning_web/live/run_live/show.ex
@@ -66,8 +66,7 @@ defmodule LightningWeb.RunLive.Show do
             <LayoutComponents.breadcrumbs>
               <LayoutComponents.breadcrumb_project_picker
                 project={@project}
-                current_user={@current_user}
-                access_root={@access_root}
+                label={@project_label}
               />
               <LayoutComponents.breadcrumb_items items={[
                 {"History", ~p"/projects/#{@project}/history"}
diff --git a/lib/lightning_web/live/sandbox_live/index.ex b/lib/lightning_web/live/sandbox_live/index.ex
index fd58fe3321..703206cead 100644
--- a/lib/lightning_web/live/sandbox_live/index.ex
+++ b/lib/lightning_web/live/sandbox_live/index.ex
@@ -436,8 +436,7 @@ defmodule LightningWeb.SandboxLive.Index do
             <LayoutComponents.breadcrumbs>
               <LayoutComponents.breadcrumb_project_picker
                 project={@project}
-                current_user={@current_user}
-                access_root={@access_root}
+                label={@project_label}
               />
               <LayoutComponents.breadcrumb>
                 <:label>Sandboxes</:label>
diff --git a/lib/lightning_web/live/workflow_live/edit.ex b/lib/lightning_web/live/workflow_live/edit.ex
index 2326f20bc2..cabfcf2c9b 100644
--- a/lib/lightning_web/live/workflow_live/edit.ex
+++ b/lib/lightning_web/live/workflow_live/edit.ex
@@ -97,8 +97,7 @@ defmodule LightningWeb.WorkflowLive.Edit do
             <LayoutComponents.breadcrumbs>
               <LayoutComponents.breadcrumb_project_picker
                 project={@project}
-                current_user={@current_user}
-                access_root={@access_root}
+                label={@project_label}
               />
               <LayoutComponents.breadcrumb_items items={[
                 {"Workflows", "/projects/#{@project.id}/w"}
diff --git a/lib/lightning_web/live/workflow_live/index.ex b/lib/lightning_web/live/workflow_live/index.ex
index 5c3f48706b..d8b16bf2c0 100644
--- a/lib/lightning_web/live/workflow_live/index.ex
+++ b/lib/lightning_web/live/workflow_live/index.ex
@@ -41,8 +41,7 @@ defmodule LightningWeb.WorkflowLive.Index do
             <LayoutComponents.breadcrumbs>
               <LayoutComponents.breadcrumb_project_picker
                 project={@project}
-                current_user={@current_user}
-                access_root={@access_root}
+                label={@project_label}
               />
               <LayoutComponents.breadcrumb>
                 <:label>{@page_title}</:label>
diff --git a/test/lightning_web/components/layout_components_test.exs b/test/lightning_web/components/layout_components_test.exs
index b48db2d0c1..d738b090f6 100644
--- a/test/lightning_web/components/layout_components_test.exs
+++ b/test/lightning_web/components/layout_components_test.exs
@@ -62,21 +62,16 @@ defmodule LightningWeb.LayoutComponentsTest do
   end
 
   describe "breadcrumb_project_picker/1" do
-    test "renders ReactComponent mount point for a root project" do
+    test "renders the ReactComponent mount point for a root project" do
       project = %Lightning.Projects.Project{
         id: Ecto.UUID.generate(),
         name: "my-project",
-        parent_id: nil,
-        parent: %Ecto.Association.NotLoaded{
-          __field__: :parent,
-          __owner__: Lightning.Projects.Project,
-          __cardinality__: :one
-        }
+        parent_id: nil
       }
 
       html =
         (&LayoutComponents.breadcrumb_project_picker/1)
-        |> render_component(%{project: project})
+        |> render_component(%{project: project, label: "my-project"})
 
       assert html =~ "breadcrumb-project-picker-trigger"
       assert html =~ ~s(data-react-name="PickerButton")
@@ -84,7 +79,7 @@ defmodule LightningWeb.LayoutComponentsTest do
       assert html =~ ~s(data-is-sandbox="false")
     end
 
-    test "renders ReactComponent mount point with sandbox data" do
+    test "renders the ReactComponent mount point for a sandbox" do
       parent = %Lightning.Projects.Project{
         id: Ecto.UUID.generate(),
         name: "parent-project"
@@ -100,45 +95,17 @@ defmodule LightningWeb.LayoutComponentsTest do
 
       html =
         (&LayoutComponents.breadcrumb_project_picker/1)
-        |> render_component(%{project: project})
+        |> render_component(%{
+          project: project,
+          label: "parent-project/my-sandbox"
+        })
 
       assert html =~ "breadcrumb-project-picker-trigger"
       assert html =~ ~s(data-react-name="PickerButton")
-      assert html =~ ~s(data-label="my-sandbox")
+      assert html =~ ~s(data-label="parent-project/my-sandbox")
       assert html =~ ~s(data-is-sandbox="true")
       assert html =~ ~s(data-color="#E33D63")
     end
-
-    test "uses the access_root attr to truncate the displayed ancestor chain" do
-      root = insert(:project, name: "acme-workspace")
-      sandbox = insert(:project, name: "acme-staging", parent: root)
-
-      html =
-        (&LayoutComponents.breadcrumb_project_picker/1)
-        |> render_component(%{project: sandbox, access_root: sandbox})
-
-      assert html =~ ~s(data-label="acme-staging")
-      refute html =~ "acme-workspace/acme-staging"
-    end
-
-    test "derives access_root from current_user when access_root is not passed" do
-      user = insert(:user)
-      root = insert(:project, name: "acme-workspace")
-
-      sandbox =
-        insert(:project,
-          name: "acme-staging",
-          parent: root,
-          project_users: [%{user: user, role: :admin}]
-        )
-
-      html =
-        (&LayoutComponents.breadcrumb_project_picker/1)
-        |> render_component(%{project: sandbox, current_user: user})
-
-      assert html =~ ~s(data-label="acme-staging")
-      refute html =~ "acme-workspace/acme-staging"
-    end
   end
 
   describe "global_project_picker/1" do