I added this release https://musicbrainz.org/release/cf3f8217-f84c-4f29-8750-f46103dfda3c and based it on an exisiting multi-CD release. However, all discs were presented to me in a collapsed fashion so I only entered “Hybrid SACD” for each medium. Thinking no further, I submitted the release but now there are no tracklists and/or media.
A quick test showed that tracks / media would be added if each medium is expanded before submitting. Not sure why this happens, might be related to this userscript
// ==UserScript==
// @name MusicBrainz: Expand/collapse release groups
// @description See what’s inside a release group without having to follow its URL. Also adds convenient edit links for it.
// @namespace http://userscripts.org/users/266906
// @author Michael Wiencek mwtuea@gmail.com
// @version 2018.2.18.1
// @license GPL
// @downloadURL https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/master/expand-collapse-release-groups.user.js
// @updateURL https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/master/expand-collapse-release-groups.user.js
