Attempting to bookmark a moderator-removed comment returns "You are not permitted to view the requested resource."

When I select //*[@id="ember38"] at discussion.fedoraproject.org/t/173585/35:

<button class="btn no-text btn-icon fk-d-menu__trigger bookmark-menu-trigger post-action-menu__bookmark btn-flat bookmark widget-button bookmark-menu__trigger btn-icon no-text" aria-expanded="false" title="bookmark this post" data-identifier="bookmark-menu" data-trigger="" type="button" id="ember38">
<svg class="fa d-icon d-icon-bookmark svg-icon svg-string" aria-hidden="true" xmlns="http://www.w3.org/2000/svg"><use href="#bookmark"></use></svg>      <span aria-hidden="true">
          ​
        </span>
<!---->    
    </button>

…I see:

An error occurred: You are not permitted to view the requested resource.

The ECMAScript console returns:

12:24:12.798 XHRPOST
https://discussion.fedoraproject.org/bookmarks.json
[HTTP/2 403  160ms]

12:24:04.683 Uncaught (in promise) TypeError: can't access property "saveData", e is undefined
    create bookmark-api.js:20
    create post-bookmark-manager.js:36
    onBookmark bookmark-menu.gjs:124
    onShowMenu bookmark-menu.gjs:147
    show float-kit-instance.js:28
    show d-menu-instance.js:101
    onTrigger d-menu-instance.js:136
    onClick d-menu-instance.js:120
bookmark-api.js:20:7

Instead, it should be hidden, or (perhaps, better yet), disabled.