Track view keeps zooming out.

[RexRed]

I am constantly having to zoom back in on the track view.

I am usually holding shift and dragging clips from one track to another and it seems to happen every few minutes the tracks simply zoom out all the way all on their own.

I am sure this feature is nice for some but I can't seem to figure out why it is happening and it is very time consuming having to zoom back in every couple minutes... especially when you have dozens of takes...

What is causing this and how do I avoid it?

Thanks for any responses to this.

[Starship Krupa]

The default mousewheel behavior is to zoom tracks horizontally, if you have something similar to a Logitech Marathon with the super fast wheel turned on, it will zoom very quickly.

[user 905133]

Long shot (probably doesn't apply, but if it does I would be remiss if I didn't say anything): I used to have a wireless mouse/keyboard combo that when the batteries got low, the zoom-in button had a mind of its own--particularly evident with web browsers.  Probably less than 1/100th of a % chance this is your issue, but I thought I'd mention it. (You may have already checked the batteries if you use them.) 

[RexRed]

It doesn't really do it on its own like the mouse is sending some odd data.

It does it only when I am holding  shift and dragging a take from one track to another.

[Bevan]

This keeps always happening anytime I try to move clips while holding shift, has anyone found a way to stop it happening?