I had an issue pop up with WP Document Revisions and WP Engine. We were not able to run the automated backup points provided by WP Engine due to a conflict. Here's what their support team found:
I've taken a look and it appears that there was a conflict with one of the files in the "wp-document-revisions" plugin:
That file's presence was interfering with our backup point system, and preventing backup points from being captured. I've renamed that file to .git_disabled on this end and I've requested a successful manual backup point as well, which took six seconds for the database and 55 seconds for the files for the site. The restore points should continue to work from this point forward.
It doesn't appear to have effected anyone else since there's no one else posting about this. Thought you might want to know!