diff --git a/erpnext/hr/page/organizational_chart/organizational_chart.py b/erpnext/hr/page/organizational_chart/organizational_chart.py
index 1e03e3d..2983198 100644
--- a/erpnext/hr/page/organizational_chart/organizational_chart.py
+++ b/erpnext/hr/page/organizational_chart/organizational_chart.py
@@ -32,16 +32,17 @@
 def get_connections(employee):
 	num_connections = 0
 
-	connections = frappe.get_list('Employee', filters=[
+	nodes_to_expand = frappe.get_list('Employee', filters=[
 			['reports_to', '=', employee]
 		])
-	num_connections += len(connections)
+	num_connections += len(nodes_to_expand)
 
-	while connections:
-		for entry in connections:
-			connections = frappe.get_list('Employee', filters=[
-				['reports_to', '=', entry.name]
-			])
-			num_connections += len(connections)
+	while nodes_to_expand:
+		parent = nodes_to_expand.pop(0)
+		descendants = frappe.get_list('Employee', filters=[
+			['reports_to', '=', parent.name]
+		])
+		num_connections += len(descendants)
+		nodes_to_expand.extend(descendants)
 
 	return num_connections
\ No newline at end of file
diff --git a/erpnext/public/js/hierarchy_chart/hierarchy_chart_desktop.js b/erpnext/public/js/hierarchy_chart/hierarchy_chart_desktop.js
index fd4365a..da050ab 100644
--- a/erpnext/public/js/hierarchy_chart/hierarchy_chart_desktop.js
+++ b/erpnext/public/js/hierarchy_chart/hierarchy_chart_desktop.js
@@ -103,6 +103,7 @@
 
 	setup_actions() {
 		let me = this;
+		this.page.clear_inner_toolbar();
 		this.page.add_inner_button(__('Export'), function() {
 			me.export_chart();
 		});
@@ -124,6 +125,7 @@
 	}
 
 	export_chart() {
+		frappe.dom.freeze(__('Exporting...'));
 		this.page.main.css({
 			'min-height': '',
 			'max-height': '',
@@ -147,6 +149,8 @@
 			a.href = dataURL;
 			a.download = 'hierarchy_chart';
 			a.click();
+		}).finally(() => {
+			frappe.dom.unfreeze();
 		});
 
 		this.setup_page_style();
@@ -170,7 +174,9 @@
 		this.page.main
 			.find('#hierarchy-chart-wrapper')
 			.append(this.$hierarchy);
+
 		this.nodes = {};
+		this.all_nodes_expanded = false;
 	}
 
 	make_svg_markers() {
@@ -203,7 +209,7 @@
 	render_root_nodes(expanded_view=false) {
 		let me = this;
 
-		frappe.call({
+		return frappe.call({
 			method: me.method,
 			args: {
 				company: me.company
@@ -230,8 +236,8 @@
 						expand_node = node;
 				});
 
+				me.root_node = expand_node;
 				if (!expanded_view) {
-					me.root_node = expand_node;
 					me.expand_node(expand_node);
 				}
 			}
@@ -281,10 +287,12 @@
 			]);
 		} else {
 			frappe.run_serially([
+				() => frappe.dom.freeze(),
 				() => this.setup_hierarchy(),
 				() => this.render_root_nodes(true),
 				() => this.get_all_nodes(node.id, node.name),
-				(data_list) => this.render_children_of_all_nodes(data_list)
+				(data_list) => this.render_children_of_all_nodes(data_list),
+				() => frappe.dom.unfreeze()
 			]);
 		}
 	}
@@ -360,7 +368,7 @@
 			node = this.nodes[entry.parent];
 			if (node) {
 				this.render_child_nodes_for_expanded_view(node, entry.data);
-			} else {
+			} else if (data_list.length) {
 				data_list.push(entry);
 			}
 		}