I must ask if a 'bounce to clip' was done first. This should clear the clipboard and *reset* or whatever else that action performs.
Secondly, this action makes an 'undo' function to be created. This means the original file settings is kept.
It could be that the new file is not being properly purposed and Sonar is playing the original. Just that, such an action might or should generate an error code to be displayed.
Just for the heck of it; how about transposing 12 steps (a full octave) and hear what happens.