Component used: Navigation
Version used: 1.0.0-alpha01
Devices/Android versions reproduced on: Pixel w Oreo

Two issues for the price of one!

According to the documentation, "When a user uses the Back button from a deep link destination, they navigate back up the navigation stack just as though they entered your app from the app’s entry point." (https://developer.android.com/topic/libraries/architecture/navigation/navigation-implementing#Deep-link)

I have a navigation graph which looks like [Home] -> [Articles List] -> [Specific Article]

I have a deeplink to [Specific Article]
<deepLink app:uri="www.example.com/articles/{articleId}"/>

However when the app is opened via deeplink (adb shell am start -W -a android.intent.action.VIEW -d "http://www.example.com/articles/456"), [Specific Article] is shown and only [Home] is in the backstack.

Following advice here (https://stackoverflow.com/questions/50339826/android-navigation-library-deep-linking-how-to-synthesise-backstack) I created a group. My graph now looks like this.
[Home] -> Group([Articles List] -> [Specific Article])

However now deeplinking does not link to [Specific Article] at all! The app opens on [Articles List] with [Home] in the backstack.

I would expect either implementation to behave as per documentation, with the app deep linking to [Specific Article] with both [Articles List] and [Home] in the backstack.

--- Sample project ---
Attached is a sample project demonstrating both issues.

The nav graph is as follows:
[Home] -> [Article List] -> [Article (has deep link)]
\---> Group([Issue List] -> [Issue (has deep link)])

To deep link use the following commands.

Deep link to article:
adb shell am start -W -a android.intent.action.VIEW -d "http://www.example.com/articles/456" com.example.deeplinkbackstackissue

Deep link to issue inside group:
adb shell am start -W -a android.intent.action.VIEW -d "http://www.example.com/issues/456" com.example.deeplinkbackstackissue