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Apparent lag in picking up links (to file pages)
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@He7d3r reports at https://phabricator.wikimedia.org/T59512#1212072 that there was a lag time (3 days) before Special:WhatLinksHere on a file page reflected that Flow did (in two ways actually, one a file include and one a simple link to the file).

In the code, this is apparently immediately on save (this is 'reference.recorder'), so I'm not sure what would cause this lag.

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That's not an ideal file to use for these tests since it's included a lot of places.

But when I filter on topic, it's indeed not there (and Talk:Sandbox isn't on the full list), though another one is:

Flow_topic_links_to_Example.png (282×906 px, 22 KB)

A database query confirms that, so it's apparently not a problem with ReferenceClarifier:

mysql:research@s3-analytics-slave [mediawikiwiki]> select il_from, il_to, il_from_namespace, page_title from imagelinks JOIN page on page_id = il_from WHERE il_from_namespace = 2600 AND il_to = 'Example.jpg';
+---------+-------------+-------------------+------------------+
| il_from | il_to       | il_from_namespace | page_title       |
+---------+-------------+-------------------+------------------+
|  317542 | Example.jpg |              2600 | S52i2un1zblzd8s8 |
+---------+-------------+-------------------+------------------+
1 row in set (0.00 sec)