CENIPA was also investigating a voice in the cockpit that was not in the transcript saying that the "TL doesn´t move, it is jammed".
Despite being myself someone who is asking for some investigation on the possibility of an electronical/mechanical failure I have to admit that the article has a lot of misinformation (autothrust levers ?).
Maybe someone really said something about a jammed TL but the source does not seem to be that credible.