I found a problem with the edit entities.
Before you start to edit , you look at some direction. When your in edit mode you cam around the object you edit. When done with editing the camera don't get restored to the position you used before you started to edit.
0) remember where you looking at,
1) Edit object
2) Move edit camera around
3) Stop edit.
4) Now you look not to where you looked before edit.
Solution: Remember the camera position as soon edit get enabled and restore that setting when edit get disabled.