As the attached video demonstrates, if I am editing the layout of the first screen in the project, the drag and drop works pretty well. But if I work on any screen other than the first in the project, the screen flashing and jumps. the controls do resize correctly, but is a bit of a distraction.
Thanks for flagging this @drted. Can safely say that this should probably be filed under “bugs” - will make sure this gets added to the list.