[BUG] Changed Z-Offset only working after running G29 Auto Bed Leveling

[Kr3tt3k]

I' running your latest release on Anycubic i3 Mega S.
I don't know if that's intentional, but I don't think so, so I'm asking here:

Adjusting the value for the Z offset via the menu item on the display as well as via the terminal in the Octoprint has no consequences, although the new value is saved with M500.
The change only takes effect once the Auto Bed Leveling process G29 has been done and saved.
Is this intentional?
If not, is there a way to fix this?