https://bugzilla.wikimedia.org/show_bug.cgi?id=55165
--- Comment #6 from Kunal Mehta (Legoktm) legoktm.wikipedia@gmail.com --- Yes this path retrieves the page content via special:import instead of API because API bulk call is not approved for the trunk release. Thus this patch wouldn't work for rewrite branch.
Anyway it is not clear for me, why the api returns the data by browser call but not via bot frameworks query.