Ancestor CQL search results in missing newly added child pages

Issue Summary

CQL searches by ancestor returns incomplete results if child pages.

Steps to Reproduce

1. Create a new page "Container page".
2. Create a new page "Parent page" so that it is a sibling of "Container page".
3. Create a new page "Child page" so that "Parent page" is its parent.
4. Move "Parent page" so that "Container page" becomes its parent.
5. Search for all children of "Container page": https://your-domain.atlassian.net/wiki/rest/api/search?cql=ancestor=\{ID of container page}

Expected Results

At step 5, the results include "Child page".

Actual Results

At step 5, the results do not include "Child page".

Workaround

None