Let’s try to figure out the saving part first and then see if it replaces the text if we can get it to save.
Is the save folder on a network drive or a local drive?
Please try creating a new save folder on the desktop. Go to Finder, right click on the new save folder on the desktop and click on get info. On the bottom of the info popup, make sure the permissions are set to read/write for all 3 users. If the permissions isn’t read/write for everyone then change it so that it is. Now retry a batch with the new save folder.
Let me know if that now saves and if the text is replaced in the saved copy.