list view fix

src/textual/widgets/_list_view.py

@@ -170,7 +170,14 @@ class ListView(VerticalScroll, can_focus=True, can_focus_children=False):
         """Updates the highlighting when the index changes."""
 
         if new_index is not None:
-            self.scroll_to_widget(self._nodes[new_index], animate=False, immediate=True)
+            selected_widget = self._nodes[new_index]
+            if selected_widget.region:
+                self.scroll_to_widget(self._nodes[new_index], animate=False)
+            else:
+                # Call after refresh to permit a refresh operation
+                self.call_after_refresh(
+                    self.scroll_to_widget, selected_widget, animate=False
+                )
 
         if self._is_valid_index(old_index):
             old_child = self._nodes[old_index]
@@ -200,8 +207,6 @@ class ListView(VerticalScroll, can_focus=True, can_focus_children=False):
                 until the DOM has been updated with the new child items.
         """
         await_mount = self.mount(*items)
-        if len(self) == 1:
-            self.index = 0
         return await_mount
 
     def append(self, item: ListItem) -> AwaitMount:

tests/snapshot_tests/snapshot_apps/listview_index.py

@@ -22,6 +22,7 @@ class ListViewIndexApp(App):
     async def watch_data(self, data: "list[int]") -> None:
         await self._menu.remove_children()
         await self._menu.extend((ListItem(Label(str(value))) for value in data))
+
         new_index = len(self._menu) - 1
         self._menu.index = new_index