I recently noticed that since the change to British Summer Time (BST) the auto-added post titles were an hour out:
I don't know why I hadn't picked up on this before. ¯\_(ツ)_/¯
date_default_timezone_set( "Europe/London" ); to the function which adds the title when none exists (status posts) and things are back to being as they should.
The plugin has also been updated on GitHub.