Since CEC draws only started, the score only drops a couple of points in the first draw of the month, which I believe it's because many people boost their scores by completing their work "anniversary" as usually work contracts begin at the beginning of each month.
However, in the second draw of the month, the score tends to drop considerably because usually there is no updates on candidate's profile other than birthdays, which for some people, lower their points.
But, you never know! Hope it lowers as much as possible!