Some sort of virus or something I think.

https://www.cnbc.com/2020/03/15/coronavirus-amazon-says-item...

Amazon warned it’s experiencing Prime delivery days and running out of stock of popular household items amid the coronavirus outbreak.

Also here's a related blog post by Amazon https://blog.aboutamazon.com/company-news/amazons-actions-to...

Amazon is up 289% YoY right now, give them some slack.