Possible Google Update on 12 August 2020
https://www.semrush.comLooks like most of the SERP position tackers are noticing a big change today, in SEMRush I can see a 6.8/10 volatility score in the US and a very low 2.0/10 volatility score in AU. Check out how some of the SERP Fluctuations tools reacted to it: Mozcast, Algoroo, Advanced Web Rankings.
Not sure if this is related to the Google bug from a few days ago. Keep an eye on your ranking folks, we will have a better idea about the impact in the next few days.