| 3 | | I think this is actually the expected behavior of the filter, it only affects what happens on initial page load and is not designed to hide the button always, although I can see how the naming might indicate that. These filters were introduced in https://core.trac.wordpress.org/ticket/41675 to enable developers to re-enable the (expensive) query for sound/video files when the page loads. By returning false, you are setting the button initial state to hidden, however once you change the media collection by uploading audio, the Create Audio Playlist option should appear. |
| | 3 | I think this is actually the expected behavior of the filter, it only affects what happens on initial page load and is not designed to hide the button always, although I can see how the naming might indicate that. These filters were introduced in https://core.trac.wordpress.org/ticket/31071 to enable developers to re-enable the (expensive) query for sound/video files when the page loads. By returning false, you are setting the button initial state to hidden, however once you change the media collection by uploading audio, the Create Audio Playlist option should appear. |