Leaving the Enter Join Code screen always brings you to the main Realms screen

Leaving the “Enter Join Code” screen always brings you to the main Realms screen, rather than bringing you back to whatever screen you had open before.

Steps to reproduce:

1. Open the new Realms introduction screen.

2. Press the Join Realm button in the top right of the screen.

3. Leave the “Enter Join Code” screen, either by pressing the Back button or the Escape key on your keyboard.

4. Observe where it brings you.

Expected result:

The Back button would bring you back to whatever screen you had opened before, for example the new introduction screen.

Actual result:

The Back button always brings you back to the main Realms screen.