https://wccftech.com/windows-10-april-2019-update-build-18358/

Windows 10 Insider Preview Build 18358 is now available to Insiders in the Fast ring who are currently testing the upcoming Windows 10 version 1903 aka the April 2019 Update. Today’s build brings a handful of general fixes and improvements, but there are still some known issues to be addressed.

Here’s the complete changelog. For more details, head over to the official blog post.