I'm trying to get users mentions (message_tags) included in comments. I execute this query from Facebook explorer :
GET/v2.10/ 1575295176130351_1877507262575806?fields=comments{message_tags}
When I'm authentified as an application with an app token : Facebook API returns only message_tags from type 'page'. API doesn't returns message_tags from type 'user'.
When I'm authentified as an user, with a user access token: it returns all message_tags.
Someone could explain me the reason why ? I was able to get message_tags from type 'user' with an app token 2 weeks ago... I suspect API has been updated but I can't find any clear explanation in changelog.