All tracks disappear when moving a clip - ever get that?

This happens in the following scenario in X1b:
 
I'm record clips in a track with layers turned on.  When recording additional takes Sonar keeps on adding layers.  So I delete unwanted clips and then move the ones I want to keep up, and then delete empty layers.  I like to hold shift down as I move up the clip.  If I press shift , and drag too fast or something, sometimes the track will be maximized both horizontally and vertically, so the slip takes up the entire screen.  After I zoom out and minimize the track, all the rest of the tracks are gone (they somehow get de-selected).  I have to go into track manager and re-select them to make them appear again. 
 
Trouble is, I can't re-create this scenario, but it has happened to me several times and only happens when I'm selecting the clip, pressing shift, and dragging - all real fast.  Maybe I'm hitting the wrong set of keys or selecting in the upper portion of the clip.  Is there some set of keystrokes that deselects all tracks and maximizes the clip?
 

Thanks Larry.  I don't know if anyone else will have experienced this.  I've never seen it reported.  It is strange.  It took me a while to figure out that the tracks were becoming de-selected in track manager.  At first I thought I had corrupted the project.

Happening to me reasonably regularly when moving clips in lanes like you. Not sure what causes it, been using the RESTORE VIEWS TO PREVIOUS STATE key binding to work around it or VIEW - VIEW UNDO.

Annoying though - feels like something to do with where you drag it.

Q.