Generally I don't like to use the Layout Editor of the Dashboard, but sometimes it ended to be useful.
Today, after several months I didn't use it, I went to the Layout Editor and I discovered that I am no more able to drag elements into the group, reposition them or shrink/enlarge. It seems totally blocked.
Tell us a little more about your system... node-RED version, node.js version, operating system, hardware...
Can you also post a screenshot of your Layout Editor.