UPDATE 5/18: We are starting to roll out Cumulative Update Build 21382.1000 (KB5003837). This update does not include anything new and is designed to test our servicing pipeline.
NOTE: Some Insiders with the Arabic, Greek, Dutch, Polish, Portuguese (Brazil), Portuguese (Portugal), Romanian, and Russian languages installed may see KB5003837 fail with error 0x80070002 the first time trying to install the update. It should succeed on subsequent attempts.
This update DOES NOT include any fixes for the known issues listed below.