Problem report for Slicer 4.10.0 win-amd64: [the markups can not be moved sometimes in the landmark registration module ]
Thanks for the report - unfortunately we already knew about this one but don’t have a fix. You can track the issue here: https://issues.slicer.org/view.php?id=4634
Workaround for now is to use an older Slicer (like 4.8.1).