Same thing with my Sny phone. But the solution is simple 1) deactivate the app, as stated in the article 2) create a shortcut to mbasic.facebook.com. This all

Same thing with my Sny phone. But the solution is simple 1) deactivate the app, as stated in the article 2) create a shortcut to mbasic.facebook.com. This allows private FB messages without the need for Messenger 3) Prefer discussions in private groups to avoid spamming all friends with one's Facebook activity.