New
#21
If you had set a non-zero number of day to defer while in 1809, then upgrade to 1903 it will disappear immediately. If you set it after the upgrade it disappears at the next 'check for updates'. There's an automatic one every 24 (ish) hours, so it may last for up to a day before it disappears.
The deferral still seems to be functional, it's just that you can only see it in Regedit once you have set it.