If this is only a rare case due to job lag, we only need a way to remove the “ready” tag, maybe via a “Remove from translation” link (do=unlink action) from Special:PageTranslation.

Making any edit to the page (i.e. https://meta.wikimedia.org/w/index.php?title=Africa_Environment%2FMicrofunding%2FClimate_and_Weather_trainings_and_Edit-a-thons_in_Ruhengeri&diff=prev&oldid=24776875&diffmode=source ) seems to clear the stale tag

As defined in Hooks::addTranstagAfterSave(), this method is called on every page save as defined in HookHandler.php#236, The method in turn checks whether the page contains the <translate></translate> tags and marks the page with tp:tag if it does, which is the indication that the page is ready to be marked for translation.

However,

• 3rd step in reproducing [something similar to] this bug should have actually been to mark the page for translation.
• 4th step is to remove the markup
• 5th is to move the page.

This is the only way that I have managed to reproduce something close to this bug.

Some points to note:

• Removing the <translate></translate> tags before marking the page for translation leaves row with tp:tag attribute against a revision of the page inside the revtag table in the DB.
• Moving the page as in the 5th step above also doesn't produce this bug as defined in the ticket description.
• The logic that shows the 'Mark this page for translation' link depends on Hooks::sourcePageHeader()#1272.
• From what I could gather on this line, $hasChanges = $ready === $latest && $marked !== $latest;, the latest revision number will change once the tags are removed and page saved. This produces a different revisionID (an increment of the last revisionID) from the revision that received the tp:tag. Thus, $hasChanges is false. So the link will not show. The comment I made above is misleading.

In order to reproduce this again, I preloaded Special:MovePage in a second tab before removing translate tags; so I can quickly submit the move forms just after having removed the tags.

I'm able to reproduce this.

1. Create a page with <translate> markup.
2. Removed the <translate> markup.
3. Moved the page. Note that this used the default Special:MovePage in MediaWiki

After the move noticed the Mark this page for translation.

Values in the revtag table:

When tagging the page initially with <translate> tags:

After removing the <translate> tag:

After moving the page again rt_revision :

After moving the page, the rt_revision gets updated. I believe this happens in MediaWiki\Extension\Translate\PageTranslation\Hooks::updateTranstagOnNullRevisions.

Change 922103 had a related patch set uploaded (by Abijeet Patro; author: Abijeet Patro):

[mediawiki/extensions/Translate@master] Check if page has translate markup before updating tp:tag revision

https://gerrit.wikimedia.org/r/922103

Change 922103 merged by jenkins-bot:

[mediawiki/extensions/Translate@master] Check if page has translate markup before updating tp:tag revision

https://gerrit.wikimedia.org/r/922103