I am currently on v1809 build 17763.316 and while checking for updates it flagged Windows 10 Insider Preview 10.0.18342.8 (19h1_release) update. The first time it seemed to update correctly - checked with Winver and it displayed the new version. I decided to recheck with Windows Update and it again downloaded and installed Windows 10 Insider Preview 10.0.18342.8 (19h1_release). And again downloaded and install this time my version show my original 17763.316.
Anyway, It has now tried to download and install the new versions 3 times.
System has been stable and no recent install other than antivirus updated for Defender.
My system is a HP Envy AIO 34.