diff --git a/packages/cli/src/workflows/triggers/__tests__/workflow-trigger-activator.test.ts b/packages/cli/src/workflows/triggers/__tests__/workflow-trigger-activator.test.ts
index 675670a9fa4..5e2e221aa1a 100644
--- a/packages/cli/src/workflows/triggers/__tests__/workflow-trigger-activator.test.ts
+++ b/packages/cli/src/workflows/triggers/__tests__/workflow-trigger-activator.test.ts
@@ -167,6 +167,54 @@ describe('WorkflowTriggerActivator', () => {
 			);
 		});
 
+		test('brackets the registrar call with an acquired isolate so path expressions resolve', async () => {
+			const callOrder: string[] = [];
+			vi.spyOn(WorkflowExpression.prototype, 'acquireIsolate').mockImplementation(async () => {
+				callOrder.push('acquire');
+			});
+			vi.spyOn(WorkflowExpression.prototype, 'releaseIsolate').mockImplementation(async () => {
+				callOrder.push('release');
+			});
+			vi.spyOn(WorkflowExecuteAdditionalData, 'getBase').mockResolvedValue(
+				mock<IWorkflowExecuteAdditionalData>(),
+			);
+			const webhookTriggerRegistrar = mock<WebhookTriggerRegistrar>();
+			webhookTriggerRegistrar.getNodesWithUnregisteredWebhooks.mockImplementation(async () => {
+				callOrder.push('resolve');
+				return new Set(['w']);
+			});
+			const activator = buildActivator({ webhookTriggerRegistrar });
+
+			await activator.getNodesWithUnregisteredWebhooks(
+				mock<WorkflowEntity>({ id: 'wf-1', name: 'Test workflow', staticData: {}, settings: {} }),
+				{ nodes: [node('w', 'webhook')], connections: {} },
+			);
+
+			expect(callOrder).toEqual(['acquire', 'resolve', 'release']);
+		});
+
+		test('releases the isolate when the registrar throws', async () => {
+			vi.spyOn(WorkflowExecuteAdditionalData, 'getBase').mockResolvedValue(
+				mock<IWorkflowExecuteAdditionalData>(),
+			);
+			const releaseIsolate = vi
+				.spyOn(WorkflowExpression.prototype, 'releaseIsolate')
+				.mockResolvedValue(undefined);
+			vi.spyOn(WorkflowExpression.prototype, 'acquireIsolate').mockResolvedValue(undefined);
+			const webhookTriggerRegistrar = mock<WebhookTriggerRegistrar>();
+			webhookTriggerRegistrar.getNodesWithUnregisteredWebhooks.mockRejectedValue(new Error('boom'));
+			const activator = buildActivator({ webhookTriggerRegistrar });
+
+			await expect(
+				activator.getNodesWithUnregisteredWebhooks(
+					mock<WorkflowEntity>({ id: 'wf-1', name: 'Test workflow', staticData: {}, settings: {} }),
+					{ nodes: [node('w', 'webhook')], connections: {} },
+				),
+			).rejects.toThrow('boom');
+
+			expect(releaseIsolate).toHaveBeenCalledTimes(1);
+		});
+
 		test('returns empty without calling the registrar when there are no trigger nodes', async () => {
 			const webhookTriggerRegistrar = mock<WebhookTriggerRegistrar>();
 			const activator = buildActivator({ webhookTriggerRegistrar });
diff --git a/packages/cli/src/workflows/triggers/workflow-trigger-activator.ts b/packages/cli/src/workflows/triggers/workflow-trigger-activator.ts
index 1303705a07f..bd2cfeabb14 100644
--- a/packages/cli/src/workflows/triggers/workflow-trigger-activator.ts
+++ b/packages/cli/src/workflows/triggers/workflow-trigger-activator.ts
@@ -155,11 +155,18 @@ export class WorkflowTriggerActivator {
 			workflowSettings: dbWorkflow.settings,
 		});
 
-		return await this.webhookTriggerRegistrar.getNodesWithUnregisteredWebhooks(
-			workflow,
-			additionalData,
-			desiredNodes,
-		);
+		// Resolving webhook triggers evaluates each node's `path`/`httpMethod`
+		// expressions (e.g. the Form Trigger's dynamic path), which needs an isolate.
+		await workflow.expression.acquireIsolate();
+		try {
+			return await this.webhookTriggerRegistrar.getNodesWithUnregisteredWebhooks(
+				workflow,
+				additionalData,
+				desiredNodes,
+			);
+		} finally {
+			await workflow.expression.releaseIsolate();
+		}
 	}
 
 	/**