V-app-bar scroll-behavior

[random362]

Hi everyone.
I'm trying to make a two-part header: regular + sticky on scroll.
According the doc

hide: The default slot area will shift up and hide as the user scrolls down. The extension slot remains visible.

But cannot achieve the expected behavior - the extension slot shift up with default one.

Sandbox

Can anyone help me?

[nickmadev]

@random362
Your questions is opening issue in this project.
#18020
If you want alternative way, you can implement it by css styling.