Is Hazel sleeping?

I have an automated system. A mac mini with plex, a usb 3.0 drive with media.
Basically, hazel monitors a directory. If it see's a file, it moves it to another directory on the usb 3.0 drive.
Sometimes, after a file is in the watched directory, it doesn't move the file until I exit plex, move the mouse, and open the download directory.
I looked at the logs and it looks normal. Sometimes I see the message:
2013-05-09 22:50:22.375 HazelHelper[188] Received unmount notification from unknown filesystem at /Volumes/firmwaresyncd.jHOdPW.
Not sure what it means?
The rules work, and the file is in the monitored directory. Just sometimes Hazel is waiting until I exit plex or move the mouse / open the directory?
Basically, hazel monitors a directory. If it see's a file, it moves it to another directory on the usb 3.0 drive.
Sometimes, after a file is in the watched directory, it doesn't move the file until I exit plex, move the mouse, and open the download directory.
I looked at the logs and it looks normal. Sometimes I see the message:
2013-05-09 22:50:22.375 HazelHelper[188] Received unmount notification from unknown filesystem at /Volumes/firmwaresyncd.jHOdPW.
Not sure what it means?
The rules work, and the file is in the monitored directory. Just sometimes Hazel is waiting until I exit plex or move the mouse / open the directory?