CIS doesn't release external hard drive

I’m running into this a lot and it’s not consistent with any one drive. Sometimes it locks it, sometimes it doesn’t and I don’t know what keeps CIS from releasing it. From searching the forum someone suggested to disable file source tracking in the sandbox config. I have auto-containment disabled as well as Viruscope. Any suggestions?

Just thinking out loud but I really would like to see an Eject button built into Comodo.