Can't drag a folder/album to the top level (LRCC)

I've migrated from Classic to CC and so I have a "Migrated Lightroom Catalog" folder in my Albums list. I'd like to move the folders and albums within it to the top level, but am having problems.

Normally what happens is you drag an item to the bottom of the list and blue bar appears right at the bottom, indicating you can drop the item there and it will be placed at the top level in the folder album folder hierarchy. But in some cases the blue bar doesn't appear.

UPDATE: Ok its me, I'm an idiot. The blue bar was appearing, but it was highlighting over the existing album in the list, so I ignored that thinking that was it trying to drag into the album (because that's what the blue bar highlighting folders does).