Whenever user navigates deeper into the app hierarchy make sure that the bottom navigation bar is not visible
On the Bottom Navigation Bar
Juhani Lehtimäki

Would not agree on a general rule here.
If it’s a navigation within the “context”/tab, e.g. History Tab and you tap an item to show details, i’d still show the navigation (user stays in the history section).
If you open a screen outside of the context, e.g. showing a wizard/setup then I’d open the screen “modally”.

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