Hi guys, unfortunally I have the same problem posted here: https://discourse.nodered.org/t/cant-move-objects-in-layout-editor/
Aside that, spacer nodes are added all the time (which is painfully to delete since no shortcut to do that quick nor group selection).
I'm using chrome and node-RED v1.0.6. Can't really change the NR version, it might cause a lot of troubles in a current functioning application in shop floor