Cannot Delete Waterfalls in Scenario Editor

Does anyone else have difficulty with the waterfalls in editor? Particularly the background waterfalls. Sometimes they just refuse to let me move or delete them after they have been placed. It is incredibly frustrating because these blasted things are so darn temperamental to set to look right in the first place, so I need to be able to edit the things, but they just up and refuse to acknowledge my existence.

Edit: For clarification, I can still get rid of them using the Map Erase feature, but that nukes everything around them too. I want to be able to always use the regular delete so that I can maintain my map formation.

yeah it started after the last update, kind of a pain, but yeah kind of a pain lol.