掲示板 Forums - Schedule statistics/graphs are a bit weird since this week

For many of my schedules, the "mastery stars over time" graph has been weird since the most recent week's update (adding week of Jul 20, according to the weekly chart's x axis tick labels): it shows dramatic decreases or increases in number of terms and mastery stars that don't seem connected to reality. One example of this, cropped a bit:

I do not actually have over three million mastery stars, nor have I halved the number of known terms in that schedule.