All of a sudden we cannot edit newly created files in the Office Web Apps. It displays a message in the browser saying "Sorry, Word Web App can't open the file in the browser because the service is busy."
The ULS logs reveal that an SPException is being thrown with the message: The file "{filename}" is locked for shared use by "{username}".
This occurs on any newly added files, and the files are not checked out when this happens.
This is an on-premise installation of SharePoint 2013 and Office Web Apps 2013.
Any help would really be appreciated.