When I wanted to drag and drop a rem under a parent rem, i found a rem appearing out of nowhere.
Video - https://www.dropbox.com/s/6mtii41p6zdh4fs/Screen%20Recording%202021-02-14%20at%203.29.44%20PM.mov?dl=0
Dragging Rems is a bit buggy indeed.
In your example, I wonder if there is some empty Rem in that white space? Did you try selecting and deleting these (possible) Rem before attempting the move?
Yes i did try. In fact, i thought this happens only in that specific document but its happening across all documents and folders.
Take a look - https://www.dropbox.com/s/25hlgmwdf8j87r5/Screen%20Recording%202021-02-14%20at%207.03.29%20PM.mov?dl=0