From grity, PF input NURL at 2:10:08. The stick started at neutral. The a/c did not. It was NDRR. Did PF not re-index his stick to neutral? Did he carry on with NU 1/3 back as his neutral? It looks like it, the PITCH (stick) stays reasonably consistent whilst the roll was active.
Was he trying to maintain PITCH with a 1/3 back bias? That would explain the climb with no ND to arrest it. Did he climb, thinking he was 'maintaining'?