Is the "Drag Midi song blocks here" zone to which you are referring in the Song Creator Track mode?
or are you referring to the "Tap2Find" MIDI zone?
While I am curious as to your purpose for doing this, I experience no ill-effect when I drag your "empty-MIDI-item.mid" to either.
Please see the attached screenshot:
PS. Please note that I'm on a Mac. OS X.