The member accumulated free spins while the bonus was active and used them after the bonus had been cancelled to generate winnings.
Based on my experience about how bonuses work in the gambling space.
If the bonus was cancelled maybe hours/days ago, it shouldn't be functional enough for a gambler to use, not to talk about using it to generate some winning, isn't it?
Why is it that, in your case, the user accumulated the free bonus and was able to use it after it was cancelled?