the "default" transition is not working "as expected" when you set a specific view for your hotspot.
You have to select a transition using this spot view.
An issue is opened on this subject, it should be fixed in next release of Panotour Pro. A "default" transition loading spot view should be used when a spot view is set.
In earlier versions you could always select spot AND pano view in the editor. Now you can select EITHER spot or pano view depending on what you select in the main-window.
No big deal - but would prefer it the earlier way!