diff --git a/src/calibre/gui2/tag_browser/model.py b/src/calibre/gui2/tag_browser/model.py
index 377ace6efa..b8cb11b5af 100644
--- a/src/calibre/gui2/tag_browser/model.py
+++ b/src/calibre/gui2/tag_browser/model.py
@@ -404,7 +404,6 @@ class TagsModel(QAbstractItemModel):  # {{{
         sort_by = config['sort_tags_by']
 
         eval_formatter = EvalFormatter()
-        intermediate_nodes = {}
 
         if data is None:
             print ('_create_node_tree: no data!')
@@ -584,23 +583,19 @@ class TagsModel(QAbstractItemModel):  # {{{
                         else:
                             if i < len(components)-1:
                                 original_name = '.'.join(components[:i+1])
-                                t = intermediate_nodes.get((original_name, tag.category), None)
-                                if t is None:
-                                    t = copy.copy(tag)
-                                    t.original_name = original_name
-                                    t.count = 0
-                                    if key != 'search':
-                                        # This 'manufactured' intermediate node can
-                                        # be searched, but cannot be edited.
-                                        t.is_editable = False
-                                    else:
-                                        t.is_searchable = t.is_editable = False
-                                    intermediate_nodes[(original_name, tag.category)] = t
+                                t = copy.copy(tag)
+                                t.original_name = original_name
+                                t.count = 0
+                                if key != 'search':
+                                    # This 'manufactured' intermediate node can
+                                    # be searched, but cannot be edited.
+                                    t.is_editable = False
+                                else:
+                                    t.is_searchable = t.is_editable = False
                             else:
                                 t = tag
                                 if not in_uc:
                                     t.original_name = t.name
-                                intermediate_nodes[(t.original_name, tag.category)] = t
                             t.is_hierarchical = \
                                 '5state' if t.category != 'search' else '3state'
                             t.name = comp