diff --git a/chrome/content/zotero/itemTree.jsx b/chrome/content/zotero/itemTree.jsx
index 95ec6b8d87..ba32f95cd7 100644
--- a/chrome/content/zotero/itemTree.jsx
+++ b/chrome/content/zotero/itemTree.jsx
@@ -1770,6 +1770,7 @@ var ItemTree = class ItemTree extends LibraryTree {
 		if (!this.isContainer(index)) {
 			return;
 		}
+		if (this.regularOnly) return;
 
 		this._lastToggleOpenStateIndex = index;