2.3.1
It was mathematically flawed, tend to keep decreasing in long term.
It's fixed now.
For your information, static price items are not affected.

I still recommend you set 'strength' value lower than 5%.
(If you don't want radical change.)

※ 'strength 5%' mean 5% of median.
median 1000, stock 1000
-> median 1000, stock 950~1050