To demonstrate that Conductor does not work with real tracks create any 32 bar "standard" type song. Create and configure for a small tag ending. Pick pretty much any jazz type style.

Set drums, bass piano for Real Tracks (mute the rest for simplicity).

Set to (say) 3 choruses.

Hit Play.

Let song build and play and get somewhere in (say) chorus #2. Bring up Conductor window and select button #5 (Last Chorus). A small yellow window appears alerting that the next chorus will be the last chorus.

The next chorus (depending on style selected) will usually sound like a last chorus (simpler drum, no bass walk) but the song will not actually take the tag ending, but it will abruptly end after playing the number of measures in the tag ending.