People who return to gambling after previously quitting may not necessarily be addicted to gambling, but they may return simply for entertainment. This is especially true if they stopped gambling to focus on their work, making it highly likely they'll gamble again only in their free time.
Given this situation, we can conclude that the person is not an addict. If we're talking about a gambling addict, it's impossible to stop gambling for a year. Usually, let alone a year, even a week is difficult for someone addicted to stop gambling.
Obviously, we are talking about a gambler who has consciously stopped gambling for one reason or another. Such a player probably gambles only for fun and adrenaline. But this cannot be said about addicted players, because the probability that an addicted player will stop on his own is close to zero.