Thanks to Swordmaker for the ping!
Microsoft has finally acknowledged an undocumented issue in Windows 10 May 2020 Update (version 2004) where weird ESENT warnings will be found under the hood in Event Viewer. Windows Event Viewer is a built-in tool that shows a log of apps and system messages, including errors and warnings with detailed information.
In Windows 10 version 2004, when you access Event Viewer tool, you’ll notice errors linked to ESENT with the error code ‘642’. ESSENT is basically a DLL component and it is used by ESE (or Extensible Storage Engine) runtime, which is a data storage technology that facilities search in Explorer and desktop.
In addition, ESE is also used for indexing media catalog on the business computers and this process should be running in the background to help Windows 10 with searches within the operating system.