Intermittently but most often when I do a "swap tracks" the channel (notated "CH" in edit) of a track gets changed. I notice the change when another instrument is assigned to the same channel. The result is that whichever is the first instrument assigned (I think that assignment is done from lowest number track to highest) the second instrument gets the voicing of the first instrument. An example.

Suppose I have track 3 assigned to instrument 53 and track 4 assigned to 34. Moving track 3 to say track 2 will (sometimes) result in its channel be changed to match the one running instrument 53.

The work around I've found is to edit the track and change all the channel assignments so something unique. So I can cure the problem but wonder whether this might be something I am inadvertently causing.

Using PT12 with a Line 6 TonePort GX as an external ASIO soundcard.