fix: flaky Org Chart Test (#27971)

cypress/integration/test_organizational_chart_desktop.js

@@ -24,7 +24,7 @@ context('Organizational Chart', () => {
 				cy.get('.frappe-control[data-fieldname=company] input').focus().as('input');
 				cy.get('@input')
 					.clear({ force: true })
-					.type('Test Org Chart{enter}', { force: true })
+					.type('Test Org Chart{downarrow}{enter}', { force: true })
 					.blur({ force: true });
 			});
 		});

cypress/integration/test_organizational_chart_mobile.js

@@ -25,7 +25,7 @@ context('Organizational Chart Mobile', () => {
 				cy.get('.frappe-control[data-fieldname=company] input').focus().as('input');
 				cy.get('@input')
 					.clear({ force: true })
-					.type('Test Org Chart{enter}', { force: true })
+					.type('Test Org Chart{downarrow}{enter}', { force: true })
 					.blur({ force: true });
 			});
 		});

erpnext/public/js/hierarchy_chart/hierarchy_chart_desktop.js

@@ -334,10 +334,12 @@ erpnext.HierarchyChart = class {
 
 			if (child_nodes) {
 				$.each(child_nodes, (_i, data) => {
+					if (!$(`[id="${data.id}"]`).length) {
 						this.add_node(node, data);
 						setTimeout(() => {
 							this.add_connector(node.id, data.id);
 						}, 250);
+					}
 				});
 			}
 		}