As a reward for my 9 months of involvement, suddenly and without prior warning 40% of my reputation has been erased! I got 3 explanations : someone quickly voted for a lot of my answers in a short time: false because I would have seen a spike "in a short time" I gave several answers: right, because sometimes I followed the evolution of the requirement, the additional answer was deleted as long as I reviewed my contributions it was the result of the recalculation of the system, unstoppable response, and opaque! ©