https://www.bleepingcomputer.com/news/microsoft/microsoft-resolves-six-windows-10-1903-issues-update-blocks-stay-on/

Microsoft resolved six Windows 10, version 1903 known issues in the KB4512941 optional cumulative update released on August 30, with compatibility blocks still being enabled for two of them.

While the issues blocking some incompatible Windows 10 devices from updating to the latest version are now fixed, the safeguard holds will be in place until early September.