We’re investigating the cause behind this and will have an official statement soon™
The prevailing theory is that the BRM’s were not properly communicating from 10 February until yesterday, so the drastic swings were the accumulation of 6 days worth of activity hitting at once. This would, of course, cause systems to seemingly have dramatic changes in short time periods.
The teams have been actively investigating since yesterday, and as soon as there’s confirmation we’ll let you know