Sometimes I often queue a bunch of new songs from different playlists and listen to them. If I like the song I'm currently listening to, I want to add it to one of my own playlists. To do so, I try to drag the song from the "Now Playing" section in the Playlist queue page. But the song I'm dragging to my playlist cannot be added and the label besides the cursor says "0 objects".
The workaround I'm using now is to drag the song from the now playing section in the bottom left corner of the window, but that's not intuitive for me as I always try to use the method above.
I've had this issue across multiple computers and operating systems during the last year, as far as I can remember.
Windows 7, Windows 10 and macOS Mojave
184.108.40.206.g259b84fa (Windows 10)