Bug? Can not track airbrushed shapes!

while playing and learning with fox's excellent tutorial
www.fcp.co/final-cut-pro/tutorials/1837-...hapes-the-mysteries- of-osc-in-final-cut-pro-x-revealed-part-2

about controlling Shapes via OSC, I stumbled over this odd 'effect':
My situation, a shape, a pic, Track Points behavior:





all fine: I move the crosshair, shape point follows - as expected.

Now, I change the Brush Type of the shape to Airbush:



Moving the crosshair has NO more effect on shape!
Changing the BrushType back to solid color - working....


Bug? Feature? Workarounds??

Mr. Mahoney to the rescue please

I could not reproduce this. I changed the brush type to airbrush and to image and tracking kept working...

lichinho wrote: I could not reproduce this....

ohooh! chances rise, it's me ... and no bug.

Would you be so kind to test it with 'my' file?
Maybe something's wrong in my settings...
unzip, double-click it

Haven't test it with a diff-. OS setting (English)

Karsten. with your file I see the same thing you do. With Brush Type set to Airbrush (or Image), tracking does not work.

It seems that this problem only occurs with the tracking set to "Attach to source".
I had tried with "Mimic source" and that seems to work ok.

lichinho wrote: ... tried with "Mimic source" and that seems to work ok.

thanks, Luís, for being my test guinea-pig ...
have to dig deeper, what implications that has for some projects....