Moving a page containing tasks resends task notifications and creates duplicates

See customer comments here. https://confluence.atlassian.com/display/DOC/Managing+Notifications+in+Confluence?focusedCommentId=600868985#comment-600868985

• Moving a page that contains tasks assigned to users re-sends the ".. has assigned you a task" notification for every task.
• After the move users see duplicate notifications in their My Tasks (but not on the page)