I've noticed some issues with changing the navigation bar title display to inline and it is different on devices in the simulator. For iPhone 14, when navigating back from a view that set the display to inline, the navigation title "Menu" stays in inline mode for a short (500ms) delay and then jumps (no animation) back to large.
On an iPhone 8, when navigating back, the title stays in inline mode instead of transitioning back to large.
Even setting the display mode to large on the first item in the nav stack doesn't have any effect on correcting the behavoir. Additionally, using a Picker with inline style works just fine. It seems to be isolated to NavigationLink with the view setting inline for the title bar display mode.