When uploading videos, I add them to relevant playlist(s) at the same time as doing the title, description, tags etc.
However, sometimes the
Add to playlist dropdown just spins saying
Loading... and doesn't load:
I've done some searches and some people suggest there is an issue if a video is unlisted, private or scheduled; but that's not the case here as can be seen from the image.
What causes the dropdown to not load the list of playlists? Is there a way to prevent it happening?