Other people's duplicate close votes aren't always displayed

[Aran-Fey]

If someone has voted to close a question as duplicate but the corresponding "Possible duplicate of XYZ" comment hasn't been loaded yet, the question XYZ won't be listed as a suggested duplicate target.

The same thing happens if the user who cast the duplicate vote manually deletes the "Possible duplicate of XYZ" comment.

This issue is caused by the fact that the script relies on the comments to list existing duplicate votes. From insert_initial_suggestions:

const DUPE_MSG = 'Possible duplicate of ';
const suggested_dupe_comments = page.question.comments.filter(c => c.text.startsWith(DUPE_MSG));