[MaterialContainerTransform] Element transition not being retained when opening a nested screen

Description:
Once we open "SCREEN A" from "HOME SCREEN" with Material Container Transform it works fine and does the return transformation too. But if we open another activity "SCREEN B" from "SCREEN A" then "SCREEN A" loses its transformation settings.

Expected behavior:
"SCREEN A" material container should retain how it was launched and return back in the same transition.

Android API version: 30

Material Library version: 1.3.0

Device: Pixel 2XL

Screenshot/Video:
Screen 1: List of arts
Screen 2: Art details
Screen 3: Artist details

We open "SCREEN 2" by clicking on art on "SCREEN 1", it follows enter and exit material transformation. But when we open "SCREEN 3" from "SCREEN 2" then "SCREEN 2" loses its material transform property.

https://user-images.githubusercontent.com/7822179/116664387-05b7b680-a9b6-11eb-9782-e243022b4d39.mp4

Empieza reproduciendo el flujo de tres pantallas descrito en el issue en Android API 30 con Material Library 1.3.0, usando el vídeo enlazado como referencia. Rastrea cómo se configura Material Container Transform al abrir Screen 2 y después Screen 3; se considera terminado cuando Screen 2 conserva su configuración de lanzamiento y regresa con la misma transición.