diff --git a/api/js/etemplate/Et2Tree/Et2Tree.ts b/api/js/etemplate/Et2Tree/Et2Tree.ts
index 23f91ef52f..a63f89e0a6 100644
--- a/api/js/etemplate/Et2Tree/Et2Tree.ts
+++ b/api/js/etemplate/Et2Tree/Et2Tree.ts
@@ -509,7 +509,10 @@ export class Et2Tree extends Et2WidgetWithSelectMixin(LitElement) implements Fin
 		{
 			let item = this.getNode(_id);
 			// if the item does not exist in the tree yet no need to refresh
-			if(item == null) return
+			if(item == null)
+			{
+				return Promise.resolve();
+			}
 			return this.handleLazyLoading(item).then((result) => {
 				item.item = [...result.item]
 				this.requestUpdate("_selectOptions")
@@ -1039,6 +1042,7 @@ export class Et2Tree extends Et2WidgetWithSelectMixin(LitElement) implements Fin
             >
 				<sl-icon name="chevron-right" slot="expand-icon"></sl-icon>
 				<sl-icon name="chevron-down" slot="collapse-icon"></sl-icon>
+                <slot></slot>
                 ${repeat(this._selectOptions, (o) => o.value, this._optionTemplate)}
             </sl-tree>
 		`;
diff --git a/mail/js/app.js b/mail/js/app.js
index 1d74109cbb..270ad85c8d 100755
--- a/mail/js/app.js
+++ b/mail/js/app.js
@@ -677,8 +677,19 @@ app.classes.mail = AppJS.extend(
 						break;
 					case 'add':
 						const current_id = tree.getValue();
-						// need to wait tree is refreshed: current and new id are there AND current folder is selected again
-						tree.refreshItem(0).then(() => {
+
+						tree._selectOptions.push({
+							id: "" + _id,
+							label: this.egw.lang("Loading..."),
+							selected: false,
+							loading: true,
+							lazy: true
+						});
+						tree.requestUpdate("_selectOptions");
+						tree.updateComplete.then(async () =>
+						{
+							// need to wait tree is refreshed: current and new id are there AND current folder is selected again
+							await tree.refreshItem(_id);
 							if (tree.getNode(_id) && tree.getNode(current_id))
 							{
 								if (!tree.getSelectedNode())
@@ -689,16 +700,19 @@ app.classes.mail = AppJS.extend(
 								{
 									// open new account
 									// need to wait new folders are loaded AND current folder is selected again
-									tree.openItem(_id, true).then(() => {
-										if (tree.getNode(_id + '::INBOX')) {
-											if (!tree.getSelectedNode()) {
-												tree.reSelectItem(current_id);
-											} else {
-												this.mail_changeFolder(_id + '::INBOX', tree, current_id);
-												tree.reSelectItem(_id + '::INBOX');
-											}
+									await tree.openItem(_id, true);
+									if (tree.getNode(_id + '::INBOX'))
+									{
+										if (!tree.getSelectedNode())
+										{
+											tree.reSelectItem(current_id);
 										}
-									});
+										else
+										{
+											this.mail_changeFolder(_id + '::INBOX', tree, current_id);
+											tree.reSelectItem(_id + '::INBOX');
+										}
+									}
 								}
 							}
 						});