Is there something I'm overlooking? I just haven't noticed this before. I think it's normal behaviour, but anyway (and maybe this helps someone):
 
I copied a two measure portion of a guitar solo to another track. I added a clip FX reverb in order to make this separated part echo over the continuing part of the solo and twist it a little.
So I noticed that as clip FX the reverbs or delays  cut off exactly where the clip ends. You need to put the FX in the track FX bin in order to make the reverb tail play to it's natural end.
 
I have several times read advice that in order to add reverb (or such) only to the end part of a clip, you split the clip near the end and use clip FX. If the whole track ends there, you can simply slip edit the track long enough to allow the FX to play to its end. But as I had copied only a portion in the middle of the solo, the copy on the new track can't be slip edited as such, because that exposes the rest of the solo.
 
Drag copying  just two measures actually copied the whole 12 measure clip, just in a slip edited form. So I guess what I need to do is apply the slip edit (which I had not knowingly done) when I get home to continue with the project. I assume that will get rid of the unnecessary 10 measures and allows me to slip stretch the clip and use clip FX that plays as long as needed..

You could bounce to clip and then drag it out so it's a longer clip equalling where you want the effect to end..

Duh...Of course...Thank you!
Drag copy and "Apply slip edit" is about as many clicks away as Bounce to clips, though. 

Ya Sonars copy /paste does seem to actually  not copy, but perhaps just point the track to the original audio file. I  have had the same experiance when trying to edit tracks. It is usefull as it alows you the option of changing the edit point.

Now if Sonar was a proper wave editor it would be as simple as copy the clip. stretch it out and simply apply silence to the unwanted tail end. But what you have to do is tool copy the clip into a wave editor to do this,, because as far as I know Sonar has no "silence" option, only volume envelopes.

It's always worked that way. Just do a slip-edit on the clip, dragging it out as long as needed for the reverb tail. No need to bounce the clip.

bitflipper


It's always worked that way. Just do a slip-edit on the clip, dragging it out as long as needed for the reverb tail. No need to bounce the clip.

But something needs to be done in order to eliminate the hidden audio. If dragging the clip longer exposes audio that is not meant to play back, then either "bounce to clip" or "apply slip edit".

Yes, that can be a problem if the clip has already been slip-edited. In that case, I split the clip at the old slip-edit boundary and mute the newly-created silent clip. 

One alternative is to insert the effect in the track fx bin and automate it, but it bugs me to incur the overhead of an effect that only comes into play for one second.

A better alternative is to drag a copy of the clip into another track and either bounce it or put the effect in the track fx bin. This is my preferred method when I want a reverb tail on, say, the last word of a vocal phrase. Then I'll usually freeze or bounce that track to remove the CPU overhead of the reverb. Since it's a copy of the original I can always change my mind later and re-do it. I can even drag it back into the original track if I like, to reduce clutter.