The end may create a second obsidian platform

Summary:

The end may create a second obsidian platform. This platform is created only when teleporting mobs (and items), and when teleporting the player, 2 platforms are formed 1 height (Y) higher. In this case, mobs spawn on the first (lower) platform and suffocate (for example, chickens).

Steps to reproduce:

1. Create a portal to the end.
2. Spawn a mob (or drop an item) over the portal so that it teleports to the end.
3. Enter the portal.

Observed results:

Created 2 obsidian platforms.

Expected results:

1 platform will be created and mobs and players and items will spawn on 1 platform.

Notes:

A world with "Caves and cliffs" creates a whole second platform, while a world without "Caves and cliffs" creates only half of the second platform.

Video:

Minecraft 2021-09-27 13-15-50.mp4