For different reasons I use playlists to organize my albums. So, if I import a new album one of my first actions is to select the new songs and use the "Send To -> Playlist -> Create Playlist"-Feature.
The first time right after starting MC the new playlist named "New Playlist" is created but is not active for renaming. I have to manually select it for rename it. After doing this once, the next so created playlist gets automatically selected by MC, so I can just start typing to rename the playlist after creating. I guess the second way is the one which is expected?!
The bug only appears when sending files that are not in MCs Library to a new playlist. I drag&drop my new files to Playing Now and for me MC is configured in a way, that it does not import them automatically after dropping files to Playing Now. So they get imported when I send them to the new created playlist.