If a smart arrow is drawn over a polyline which has knockout turned on, it cuts out the arrow or leader. Presently, there doesn't appear a way to apply an 'ignore knockout' to the smart arrows in a similar way ignore clipcube can be done.
DataCAD user since v4!
Regards
Mark Bell
Principal
ATELIER MARK BELL
Australia
https://www.ateliermarkbell.com
Regards
Mark Bell
Principal
ATELIER MARK BELL
Australia
https://www.ateliermarkbell.com