Clearly this fix mentioned in the blog did not work, it eliminated one error message and created a new one.
- We have resolved an issue where some Insiders were getting an 0x800f081f error when attempting to install an early version of KB5000842. If you continue to hit an issue with the final version of KB5000842 update, let us know via Feedback Hub.
Now when trying to W.U. from 19043.899 to 19043.928 instead of error 0x800f081f we get error 0x800f0984.
A workaround is still an update in place using an ISO file.
I just used the official MS ISO 19043.867 while online and letting it check for updates.
The installation completed without errors and the system came up to build 19043.928.
W.U. then downloaded the latest experience package and .NET updates.
I'll just keep around a little longer a backup of 19043.899 to see if there is a working fix next time around.