Black Frames Fusion Page

Hi folks,
I created a ZoomTransition in the fusion page, which causes strange black frames in the editing page. In the fusion page it even shows the frames in question as transparent, however I can not see any setting that would cause this undesired transparency. Maybe a bug?
Can someone take a look, I uploaded the Fusion Setting file to my google drive:
https://drive.google.com/open?id=1bliRsdLmAHEO4Xxg0cOpzp4xnQCKGrRa
thank you.
Davinci 15b8 win10
I created a ZoomTransition in the fusion page, which causes strange black frames in the editing page. In the fusion page it even shows the frames in question as transparent, however I can not see any setting that would cause this undesired transparency. Maybe a bug?
Can someone take a look, I uploaded the Fusion Setting file to my google drive:
https://drive.google.com/open?id=1bliRsdLmAHEO4Xxg0cOpzp4xnQCKGrRa
thank you.
Davinci 15b8 win10