After weeks of unrest, third-party tools and webmasters are now agreeing that there has been a potential algorithm update on March 14 2021.
The last confirmed update was on February 16th, and prior to this January 30th.
Webmasters have rumoured that a lot of the unrest in recent weeks has been the result of the YATI algorithm, processing more and more Yandex SERPs as it continues to learn and be influenced by user behaviour.