Library view becomes attached to mouse cursor

The Library view frequently gets somehow attached to the mouse cursor, where it moves around with the cursor, seemingly as if a mouse button was pressed and the user would flick it.

This is somewhat tricky to reproduce, but I can reproduce this by:
Creating a new Qt Quick Application with a MainForm.ui.
And double click on the MainForm.ui.qml (On the first click the view is switched to the design mode.)