Bookmark doesn't show up for some topics

[Bri]

Hey guys, I haven't been able to pick out the common thread between them, but there are a few topics that don't seem to have their bookmarks either stored nor retrieved, for example this one: https://community.nodebb.org/topic/503/nodebb-plugin-shoutbox-shoutbox-plugin

Is there something different about this one?

[julian]

Hm... nope, I have a bookmark for that one.

There may be a small chance that old topics on this forum don't have their bookmarks set properly. We switched from pids to post indexes, and any old bookmarks might still be referencing the pid.