Distribution Data issues

Drop in simple distribution and a spike in multiple distribution on June 13th 2020

We see a drop in value of simple distribution data compared to its surrounding weeks. On the same date, we see a spike in multiple distribution data. Following are sample plots from top state-brand combinations of which majority exhibit this behaviour.

Note: Currently we perform cleanup operations whenever distribution value exceeds 3 standard deviations from the rolling mean. These spikes were not dropped in those operations.

1) Simple distribution plots

2) Multiple distribution plots

Similar unusual behaviour can observed at the end of 2020 where simple distribution spikes and multiple distribution drops.