[AppBarLayout] Does not expand when used with a nested CoordinatorLayout on version > 1.2.1

Description: When we use a CoordinatorLayout nested inside another CoordinatorLayout and we define different scroll flags for each AppBarLayout, it doesn't work properly in 1.2.1 version (and 1.3.0-rc01). Note that it works correctly on 1.0.0 version.
The goal is to have an AppBarLayout with a CollapsingToolbar (scrollFlags scroll|exitUntilCollapsed|snap) in the main CoordinatorLayout and an AppBarLayout with a Toolbar (scrollFlags scroll|enterAlways|snap) in the nested CoordinatorLayout.

Version 1.0.0 (Works as expected)	Version 1.2.1 and above (Not working)

Source code:

Project:
https://github.com/serbelga/NestedCoordinatorLayout

Layout:
https://github.com/serbelga/NestedCoordinatorLayout/blob/24d3012553ab917df35360157c0654be4dfd638d/app/src/main/res/layout/activity_coordinator.xml#L32-L52

Android API version: Android API 30

Material Library version: 1.2.1

Commencez par la reproduction liée de NestedCoordinatorLayout et les lignes 32-52 de app/src/main/res/layout/activity_coordinator.xml, en comparant le comportement entre Material Library 1.0.0 et 1.2.1 ou une version ultérieure sur Android API 30. Suivez l’interaction entre le CoordinatorLayout imbriqué et AppBarLayout ; le travail est terminé lorsque le CollapsingToolbar externe et le Toolbar interne respectent leurs indicateurs de défilement distincts et se déploient ou se réduisent comme dans la version fonctionnelle.