diff --git a/src/calibre/gui2/tweak_book/boss.py b/src/calibre/gui2/tweak_book/boss.py
index 46144acb0f..6ad79e786f 100644
--- a/src/calibre/gui2/tweak_book/boss.py
+++ b/src/calibre/gui2/tweak_book/boss.py
@@ -894,7 +894,14 @@ class Boss(QObject):
                     name = n
                     break
             if name is not None and getattr(ed, 'syntax', None) == 'html':
-                self.gui.preview.show(name)
+                if self.gui.preview.show(name):
+                    # The file being displayed by the preview has changed.
+                    # Set the preview's position to the current cursor
+                    # position in the editor, in case the editors' cursor
+                    # position has not changed, since the last time it was
+                    # focused. This is not inefficient since multiple requests
+                    # to sync are de-bounced with a 100 msec wait.
+                    self.sync_preview_to_editor()
             if name is not None:
                 self.gui.file_list.mark_name_as_current(name)
             if ed.has_line_numbers:
diff --git a/src/calibre/gui2/tweak_book/preview.py b/src/calibre/gui2/tweak_book/preview.py
index 1371d4d2dd..cef89471e3 100644
--- a/src/calibre/gui2/tweak_book/preview.py
+++ b/src/calibre/gui2/tweak_book/preview.py
@@ -528,6 +528,7 @@ class Preview(QWidget):
             self.current_name = name
             parse_worker.add_request(name)
             self.view.setUrl(QUrl.fromLocalFile(current_container().name_to_abspath(name)))
+            return True
 
     def refresh(self):
         if self.current_name: