Thank you for your post.
This issue does look similar to Knowledge Base Article #10162, but that was resolved in FileMaker Pro 12.0v4. Since you are using FileMaker Pro 13, have you tried updating to the latest version (13.0v9)? I don't see any issues reported for FileMaker Pro 13, so it may be best if you sent in your database file so I can test it here. Check your Inbox at the top of this page for instructions where to send the file.