diff --git a/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/ButtonExtendedProperties.tsx b/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/ButtonExtendedProperties.tsx
index cc5da513a4..6ca0e077a7 100644
--- a/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/ButtonExtendedProperties.tsx
+++ b/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/ButtonExtendedProperties.tsx
@@ -28,13 +28,17 @@ import {ActionEventTypes, PromptActionTypes} from '@/features/flows/models/eleme
  * button's `eventType`; `SignOut` is a submit button that additionally raises
  * the `SIGN_OUT_CONFIRM` prompt action, so one selection maps onto two fields.
  *
+ * `SignOut` deliberately carries the same literal that is persisted as
+ * `prompts[].action.type`, so the value selected here and the value in the flow
+ * definition are one vocabulary rather than a UI-only alias.
+ *
  * The remaining `ActionEventTypes` (navigate, cancel, reset, back) are handled
  * by the SDK renderers but deliberately not offered here.
  */
 const ACTION_OPTIONS = {
   Submit: 'SUBMIT',
   Trigger: 'TRIGGER',
-  SignOut: 'SIGN_OUT',
+  SignOut: PromptActionTypes.SignOutConfirm,
 } as const;
 
 type ActionOption = (typeof ACTION_OPTIONS)[keyof typeof ACTION_OPTIONS];
@@ -75,8 +79,10 @@ function ButtonExtendedProperties({resource, onChange}: ButtonExtendedProperties
 
     onChange('eventType', nextAction, resource);
     // Clearing keeps the button from silently staying a sign-out confirmation
-    // after the author picks a plain action.
-    if (element?.actionType) {
+    // after the author picks a plain action. Only the type this selector owns is
+    // cleared, so an action type it does not model (e.g. REJECT, authored in the
+    // flow definition directly) is left untouched rather than discarded.
+    if (element?.actionType === PromptActionTypes.SignOutConfirm) {
       onChange('actionType', '', resource);
     }
   };
@@ -135,7 +141,7 @@ function ButtonExtendedProperties({resource, onChange}: ButtonExtendedProperties
             {t('flows:core.buttonExtendedProperties.action.trigger', 'Trigger Action')}
           </MenuItem>
           <MenuItem value={ACTION_OPTIONS.SignOut}>
-            {t('flows:core.buttonExtendedProperties.action.signOut', 'Trigger Signout')}
+            {t('flows:core.buttonExtendedProperties.action.signOut', 'Sign Out Action')}
           </MenuItem>
         </Select>
         <FormHelperText>
diff --git a/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/__tests__/ButtonExtendedProperties.test.tsx b/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/__tests__/ButtonExtendedProperties.test.tsx
index f9afb2cc9e..995ab9e966 100644
--- a/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/__tests__/ButtonExtendedProperties.test.tsx
+++ b/frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/__tests__/ButtonExtendedProperties.test.tsx
@@ -276,6 +276,24 @@ describe('ButtonExtendedProperties', () => {
       expect(mockOnChange).toHaveBeenCalledWith('actionType', '', resource);
     });
 
+    it('should preserve an action type the selector does not model', async () => {
+      // REJECT is a valid prompt action type with no option here. Clearing it would silently
+      // discard a type authored directly in the flow definition.
+      const user = userEvent.setup();
+      const resource = createMockResource({
+        actionType: 'REJECT',
+        eventType: 'SUBMIT',
+      } as Partial<Resource>);
+
+      render(<ButtonExtendedProperties resource={resource} onChange={mockOnChange} />);
+
+      await user.click(screen.getByRole('combobox'));
+      await user.click(screen.getByRole('option', {name: 'flows:core.buttonExtendedProperties.action.trigger'}));
+
+      expect(mockOnChange).toHaveBeenCalledWith('eventType', 'TRIGGER', resource);
+      expect(mockOnChange).not.toHaveBeenCalledWith('actionType', '', resource);
+    });
+
     it('should not clear the action type when it was never set', async () => {
       const user = userEvent.setup();
       const resource = createMockResource({eventType: 'TRIGGER'} as Partial<Resource>);
diff --git a/frontend/apps/console/src/features/flows/models/responses.ts b/frontend/apps/console/src/features/flows/models/responses.ts
index 65e09dfa64..52e454394b 100644
--- a/frontend/apps/console/src/features/flows/models/responses.ts
+++ b/frontend/apps/console/src/features/flows/models/responses.ts
@@ -151,6 +151,12 @@ export interface FlowNodeAction {
    * ID of the next node to navigate to
    */
   nextNode: string;
+  /**
+   * Semantic action type forwarded to the next node's executor (e.g. `SUBMIT`, `REJECT`,
+   * `SIGN_OUT_CONFIRM`). Restored onto the element as `actionType` on load so a definition
+   * authored outside the builder keeps its type when the flow is saved again.
+   */
+  type?: string;
   /**
    * Executor configuration for actions that trigger executors
    */
diff --git a/frontend/apps/console/src/features/flows/utils/__tests__/flowToCanvasTransformer.test.ts b/frontend/apps/console/src/features/flows/utils/__tests__/flowToCanvasTransformer.test.ts
index 73b913292b..ea14969644 100644
--- a/frontend/apps/console/src/features/flows/utils/__tests__/flowToCanvasTransformer.test.ts
+++ b/frontend/apps/console/src/features/flows/utils/__tests__/flowToCanvasTransformer.test.ts
@@ -21,6 +21,7 @@ import VisualFlowConstants from '../../constants/VisualFlowConstants';
 import type {FlowDefinitionResponse, FlowNode} from '../../models/responses';
 import {StaticStepTypes, StepTypes} from '../../models/steps';
 import {transformFlowToCanvas} from '../flowToCanvasTransformer';
+import {transformReactFlow} from '../reactFlowTransformer';
 
 describe('flowToCanvasTransformer', () => {
   const createBaseFlowData = (nodes: FlowNode[]): FlowDefinitionResponse => ({
@@ -462,6 +463,89 @@ describe('flowToCanvasTransformer', () => {
         });
       });
 
+      it("should restore the prompt action's type onto the element", () => {
+        // A definition authored outside the builder carries the type only on the prompt action.
+        // Without restoring it the property panel cannot show it and serialization drops it.
+        const flowData = createBaseFlowData([
+          {
+            id: 'prompt-node',
+            type: 'PROMPT',
+            meta: {
+              components: [{id: 'action_confirm', type: 'ACTION', label: 'Sign out'}],
+            },
+            prompts: [{action: {ref: 'action_confirm', type: 'SIGN_OUT_CONFIRM', nextNode: 'next-node'}}],
+            layout: {position: {x: 0, y: 0}, size: {width: 300, height: 200}},
+          },
+        ]);
+
+        const result = transformFlowToCanvas(flowData);
+
+        const component = result.nodes[0].data.components?.[0] as Record<string, unknown> | undefined;
+        expect(component?.actionType).toBe('SIGN_OUT_CONFIRM');
+      });
+
+      it('should restore the type when the element carries a cleared action type', () => {
+        // Clearing the Action selector writes an empty string rather than dropping the key, and
+        // cleanComponents keeps it, so a definition saved after a clear carries actionType: ''.
+        // That means no type, so it must not block the backfill.
+        const flowData = createBaseFlowData([
+          {
+            id: 'prompt-node',
+            type: 'PROMPT',
+            meta: {
+              components: [{id: 'action_confirm', type: 'ACTION', actionType: '', label: 'Sign out'}],
+            },
+            prompts: [{action: {ref: 'action_confirm', type: 'SIGN_OUT_CONFIRM', nextNode: 'next-node'}}],
+            layout: {position: {x: 0, y: 0}, size: {width: 300, height: 200}},
+          },
+        ]);
+
+        const result = transformFlowToCanvas(flowData);
+
+        const component = result.nodes[0].data.components?.[0] as Record<string, unknown> | undefined;
+        expect(component?.actionType).toBe('SIGN_OUT_CONFIRM');
+      });
+
+      it('should keep an action type already on the element over the prompt action', () => {
+        // The element is the authoring surface, so an unwired button that still carries a type
+        // must not have it overwritten by a stale prompt action.
+        const flowData = createBaseFlowData([
+          {
+            id: 'prompt-node',
+            type: 'PROMPT',
+            meta: {
+              components: [{id: 'action_confirm', type: 'ACTION', actionType: 'REJECT', label: 'No'}],
+            },
+            prompts: [{action: {ref: 'action_confirm', type: 'SIGN_OUT_CONFIRM', nextNode: 'next-node'}}],
+            layout: {position: {x: 0, y: 0}, size: {width: 300, height: 200}},
+          },
+        ]);
+
+        const result = transformFlowToCanvas(flowData);
+
+        const component = result.nodes[0].data.components?.[0] as Record<string, unknown> | undefined;
+        expect(component?.actionType).toBe('REJECT');
+      });
+
+      it('should leave the element without an action type when the prompt action has none', () => {
+        const flowData = createBaseFlowData([
+          {
+            id: 'prompt-node',
+            type: 'PROMPT',
+            meta: {
+              components: [{id: 'submit-btn', type: 'ACTION', label: 'Submit'}],
+            },
+            prompts: [{action: {ref: 'submit-btn', nextNode: 'next-node'}}],
+            layout: {position: {x: 0, y: 0}, size: {width: 300, height: 200}},
+          },
+        ]);
+
+        const result = transformFlowToCanvas(flowData);
+
+        const component = result.nodes[0].data.components?.[0] as Record<string, unknown> | undefined;
+        expect(component).not.toHaveProperty('actionType');
+      });
+
       it('should normalize INPUT element properties', () => {
         const flowData = createBaseFlowData([
           {
@@ -679,5 +763,42 @@ describe('flowToCanvasTransformer', () => {
         expect(result.edges).toHaveLength(0);
       });
     });
+
+    describe('Action Type Round Trip', () => {
+      const signOutFlow = (): FlowDefinitionResponse =>
+        createBaseFlowData([
+          {
+            id: 'prompt_confirm',
+            type: 'PROMPT',
+            meta: {
+              components: [{id: 'action_confirm', type: 'ACTION', label: 'Sign out'}],
+            },
+            prompts: [{action: {ref: 'action_confirm', type: 'SIGN_OUT_CONFIRM', nextNode: 'session_signout'}}],
+            layout: {position: {x: 0, y: 0}, size: {width: 300, height: 200}},
+          },
+          {
+            id: 'session_signout',
+            type: 'TASK_EXECUTION',
+            executor: {name: 'SessionSignOutExecutor'},
+            layout: {position: {x: 400, y: 0}, size: {width: 200, height: 100}},
+          },
+        ]);
+
+      it('should keep the action type when a definition is loaded and serialized again', () => {
+        // Opening a flow in the builder and saving it must not change its meaning. Before the type
+        // was restored onto the element, this round trip silently dropped it and a sign-out flow
+        // regressed into an endless confirmation loop.
+        const canvas = transformFlowToCanvas(signOutFlow());
+
+        const saved = transformReactFlow({edges: canvas.edges, nodes: canvas.nodes});
+
+        const prompt = saved.nodes.find((node) => node.id === 'prompt_confirm');
+        expect(prompt?.prompts?.[0].action).toMatchObject({
+          ref: 'action_confirm',
+          nextNode: 'session_signout',
+          type: 'SIGN_OUT_CONFIRM',
+        });
+      });
+    });
   });
 });
diff --git a/frontend/apps/console/src/features/flows/utils/flowToCanvasTransformer.ts b/frontend/apps/console/src/features/flows/utils/flowToCanvasTransformer.ts
index b6a8c34026..3afe21be6f 100644
--- a/frontend/apps/console/src/features/flows/utils/flowToCanvasTransformer.ts
+++ b/frontend/apps/console/src/features/flows/utils/flowToCanvasTransformer.ts
@@ -123,6 +123,13 @@ function restoreButtonAction(
   if (matchingAction) {
     return {
       ...component,
+      // Backfill the prompt action's type onto the element, which is where the property panel reads
+      // it from and where serialization projects it back out of. Only when the element does not
+      // already carry one: an unwired button keeps its type on the element alone, since a prompt
+      // action is only emitted once the button has a nextNode. Clearing the selector writes an empty
+      // string rather than dropping the key, and that empty string is persisted, so treat it as no
+      // type rather than as a type worth preserving.
+      ...(matchingAction.type && !component.actionType ? {actionType: matchingAction.type} : {}),
       action: {
         type: matchingAction.executor ? 'EXECUTOR' : 'NEXT',
         onSuccess: matchingAction.nextNode,
diff --git a/frontend/packages/i18n/src/locales/en-US.ts b/frontend/packages/i18n/src/locales/en-US.ts
index 43a184cf76..44acf66475 100644
--- a/frontend/packages/i18n/src/locales/en-US.ts
+++ b/frontend/packages/i18n/src/locales/en-US.ts
@@ -3821,7 +3821,7 @@ const translations = {
     'core.buttonExtendedProperties.action.label': 'Action',
     'core.buttonExtendedProperties.action.submit': 'Submit Form',
     'core.buttonExtendedProperties.action.trigger': 'Trigger Action',
-    'core.buttonExtendedProperties.action.signOut': 'Trigger Signout',
+    'core.buttonExtendedProperties.action.signOut': 'Sign Out Action',
     'core.buttonExtendedProperties.action.hint': 'What happens when the button is activated',
     'core.buttonExtendedProperties.startIcon.label': 'Start Icon',
     'core.buttonExtendedProperties.startIcon.placeholder': 'Enter icon path (e.g., assets/images/icons/icon.svg)',