Fusion 9 Studio crashes

Dear Blackmagic Team,
I have a Background-node and a rectangle mask. This rectangle appears from frame 0 to 10.
In the Spline window I smooth both Keyframes with F.Then I enable Motion Blur and I can watch the animation with motion blur on.
Now: The second keyframe at 10 frames "overshoots".
When I want watch the animation with motion blur ON Fusion crashes. It also crashes when I try to render (i.e a png sequence).

Can anybody help?

I work on a Mac OS 10.13.6 Fusion Studio Version 9.0.2 build 15

Just a simple animation with the second keyframe "overshooting".

Fusion crash.png (630.52 KiB) Viewed 534 times

To whom it may concern, ...
Problem solved, helped myself
Disabled OpenCL tools in the preferences, and Fusion did not crash anymore.