I just collected from my castle. Gems went from 4 to 7. Energy to 12. I got a wisp, who knows what else. Then I clicked on the magic garden. The screen did the "loading" thing and my cave rewards were gone! No energy, no gems, presumeably my other lovelies too were all gone. Waaaaa! Two lumin essence and spicy meal are so hard to make!! So expensive!!
Then there was only a floating Dark Cave Formation in a box. My kingdom is really full but I finally found a spot to park it.
But I wanted everything else that disappeared!! Oh, phoo.