Eden did this today, it's the first time I've seen it
the save/warp/exit menu is under the block menu, and most block icons are blank. It was hard to get the menus to work or to get them all to go away. It also gave me the colour menu over the save/warp/exit menu. It did this after I switched to the photos and settings and then back to Eden. I do that all the time, so really I don't know what made it do it this time.