Positioning layers regressed from 2.42.6 and 2.43.4
In piper we see a regression somewhere between version 2.42.6 and 2.43.4. The outline of the mouse and the leader lines are drawn in separate layers. After the regression the layers are no longer positioned correctly on top of each other.
An example SVG that shows the problem can be found here
The corresponding issue for Piper can be found here