There is not enough information out yet to speculate,
but IF the captain was out of his seat, that indicates they were not following any approved FAC reset procedure.
Also, for the people who have not flown both, the A320 and A330 are very different when it comes to the flight control computers and the location of circuit breakers. All circuit breakers (reset buttons) are within reach from the seat on the A330. Not so on the A320.
Any airline that takes safety seriously would have replaced such an important computer if it indeed had failed that many times in the past.