Steps to reproduce:

• create Quick Application from template (Qt5.4 based, without ui.qml file)
• drag the MouseArea of the resulting qml file into the Text element (so that the qml file is similar to the attached one)
• switch to Design (make sure to select the MouseArea on the Navigator tree or have the cursor placed inside the MouseArea element before switching)

Current result:

• MouseArea outline is displaced (or displayed twice - once with green, once with blue outline) - the additional one is centered on (0; 0)

Note: Switching back to Edit mode and back to Designer makes this view correct again.