https://wccftech.com/microsoft-fixing-spree-resolves-windows-10-search-cpu-spike-bugs/

The last Windows 10 cumulative update delivered for version 1903 on September 10 resulted in a number of bugs that affected some users of the operating system. Microsoft has now updated its support document, considering all the associated bugs as resolved or mitigated.

The company said it is considering the Search and Start menu issue as resolved since it hasn’t found the bug “significantly impacting users originating from KB4515384 [September 10 patch].”