--- a/src/eric7/QScintilla/Shell.py	Thu Nov 02 11:26:51 2023 +0100
+++ b/src/eric7/QScintilla/Shell.py	Thu Nov 02 13:36:44 2023 +0100
@@ -259,6 +259,7 @@
         self.inDragDrop = False
         self.lexer_ = None
         self.completionText = ""
+        self.__shuttingDown = False
 
         self.clientType = ""
 
@@ -404,6 +405,7 @@
         """
         for clientType in self.__historyLists:
             self.saveHistory(clientType)
+        self.__shuttingDown = True
 
     def __bindLexer(self, language="Python3"):
         """
@@ -2546,7 +2548,7 @@
         """
         Private slot to restart the default shell when the project is closed.
         """
-        if Preferences.getProject("RestartShellForProject"):
+        if not self.__shuttingDown and Preferences.getProject("RestartShellForProject"):
             self.dbs.startClient(False)
             self.__getBanner()