...

src/calibre/gui2/tweak_book/boss.py

@@ -285,7 +285,7 @@ class Boss(QObject):
                                 det_msg=job.traceback, show=True)
         if cn:
             self.save_manager.clear_notify_data()
-        self.gui.check_book.clear()
+        self.gui.check_book.clear_at_startup()
         dictionaries.clear_ignored(), dictionaries.clear_caches()
         parse_worker.clear()
         container = job.result

src/calibre/gui2/tweak_book/check.py

@@ -73,14 +73,17 @@ class Check(QSplitter):
         h.anchorClicked.connect(self.link_clicked)
         h.setOpenLinks(False)
         self.addWidget(h)
-        self.clear_help(_('Check has not been run'))
         self.setStretchFactor(0, 100)
         self.setStretchFactor(1, 50)
+        self.clear_at_startup()
 
         state = tprefs.get('check-book-splitter-state', None)
         if state is not None:
             self.restoreState(state)
 
+    def clear_at_startup(self):
+        self.clear_help(_('Check has not been run'))
+
     def context_menu(self, pos):
         m = QMenu()
         if self.items.count() > 0: