If you go on this demo and nest everything in a single parent, open that parent, drag and release it quickly towards the bottom it will disappear.
What happens is that it doesn’t check if the destination is a child of the dragged item
If you go on this demo and nest everything in a single parent, open that parent, drag and release it quickly towards the bottom it will disappear.
What happens is that it doesn’t check if the destination is a child of the dragged item