I created a qleader as a "spline with arrow" (3 points) in one tab and it worked fine.
I then copied and pasted this spline into another tab and it now displays as straight lines rather than a curve.
The original leader still displays correctly though.
The properties still state that it is a "spline with arrow".
I have tried regenall, saving and restarting autocad 2015 and the issue still remains.
If I create a new qleader in this tab, the issue remains, i.e. it says it is a spline, but displays as straight lines.

Has anyone else seen this issue? or can anyone suggest a fix?

Thanks