The go around was initiated fairly early, what could have been the reason, other than wx.
I`d suggest the start of the causal sequence chain was in the intermediate approach phase. The crew reacted by throwing away the landing and taking the problem back up to resolve it. If indeed the issue was stab trim related then flap down selection would have exacerbated it by the ensuing pitch down, which with a locked nose down pitch trim and the high energy of the go around and the normal crew reaction of reducing thrust, with an underwing engined aircraft, would also add the nose down pitch angle.
In such a scenario I cannot see how fault and error may be attributable to crew error.