Currently, the DOC360 page unlocks for editing to other users when the current user is in the edit mode for more than 15 minutes. And when someone else, starts editing the page, all the current users' edits are vanished. This is a major flaw.
The typical behavior should be:
"Send a notification to the current user that this page has been inactive for over 15 minutes. Do you wish to continue editing, or do you wish to unlock it to make it available to others?"
A longer run solution is to:
"Build something similar to Confluence. Allow parallel editing, and when the other users publish a newer version of the page, let the current user know of this and allow them to refresh to view the change simultaneously, keeping the current user changes intact."