Hmmm.. yeah, that is very different to ST3 Song Duplication behaviour.
I see same in ST4 1832 and hope Peter will confirm that as a Bug (or just not yet implemented).
Just to clarify, when you say "i tried to import the same audio from the original song" do you mean:
- Import the same audio files from a local folder/cloud folder/USB drive (i.e. not the Stage Traxx folder), or
- Import the audio files from the Stage Traxx 4<song title folder>\
I can also repro point 2. which is what I suspect you mean.