https://wccftech.com/new-windows-10-version-1903-build-is-out-brings-general-fixes/

Microsoft is pushing out another Windows 10 Insider Preview build to Insiders in the Fast ring. The company has stopped working on any new features and is completely focused on fixing the bugs and making general improvements before releasing Windows 10 1903 (19H1 branch) to the general public. Microsoft has also removed the alert that warned Insiders of these builds being full of bugs as the list of known issues continue to get shorter.

Will we be able to get an RTM build by the end of March? Hopefully. But until that happens, here is everything that’s fixed in Windows 10 1903 Preview Build 18351.