Microsoft has resumed the rollout of Windows 10 1809, Windows Server 2019 and Windows Server, version 1809. The ISO’s are now available to download from the Volume Licensing Service Center once again.
Microsoft have posted about resuming the rollout and how they test and validate updates over on the Windows blog. There’s also a good post on the Windows IT Pro blog regarding the volume license availability of the new update. I recommend both the Windows Experience and the Windows IT Pro blog for official news and updates.