Link feature on the new editor doesn't reliably list results

Issue Summary

The link feature (Ctrl+K / Command+K) is not reliably suggesting Pages and Jira tickets, with some of the available options appearing on the results and some of them not.

Steps to Reproduce

1. Create a page on the linked space
2. Insert a link (Ctrl+K / Command+K)
3. Start typing a Page's title or Jira Issue Key

Expected Results

It should suggest all corresponding pages and tickets

Actual Results

Sometimes, it doesn't list specific pages or tickets:

Workaround

Paste the direct link to the page/ ticket.