Mistake when locating a source

1. Open attached file
2. On project tree, select "Source ponctuelle 2" in "Site2"
3. Activate "localiser"

The label is far from the source I'm not able to reproduce exactly the sequences to get the problem. FYI, I've used rotations functions (site and subsite rotations using projet tree and selection on modeler).modele_pb_localisation_source.xml