@Sibro.o
Did you dbl check in Optional updates, the update was buried under another folder in optional.
@fg,
There sure was an issue coming from .899. Deleted that ISO and creating a new one for 19043.906 and we will see how that goes. One vm on track, the other clean installed .899 was a total no go for update. No way to uninstall kb5000842. Yes to your question regarding using same kb#, MS has done this many times in the past for CU updates in Dev, Beta channels.
Regards,