Sometimes the wrong article is edited, because Article::doEdit() has side effect. I tracked it down doEdit > prepareTextForEdit > getContent -> loadContent which calls getOldID() which calls request parameters, and after that calls fetchContent which updates mTitle.
This is seen at least in 1.16.0, probably happens in trunk too.
Version: 1.16.x
Severity: major
Translate extension is using the jobqueue to update articles. They construct their own article object and call doEdit on it.
The real issue here is the fact that Article::getOldID() accesses the request parameters (evil) and allows them to override mTitle (very evil).
Looks like this has been resolved. Nothing is calling Article::loadContent (deprecated in favor of Article::fetchContent (deprecated in favor of Article::fetchContentObject))