VBA actions added to undo list when Word document is saved

When saving a word file the undo list records many, many, VBA actions (757 on my last save). So if I want to undo any action prior to the save I have to highlight the actions (757) that were add when I saved the file.

While it is saving the file the hourglass is displayed, then it says word is not responding, then the saving dialog box appears. This takes long than it should. I believe it is due to saving all the VBA commands.  I have not added any VBA commands or macros to my document. This is something that started happening recently.

The attached jpg file shows a typical undo list after saving.