/spawnpoint in the End corrupts Worldspawn

When you use /spawnpoint in the End, you will not spawn at the Worldspawn.
What I expected to happen was, that I will spawn just arround the Worldspawn, because /spawnpoint does not work in the End

Steps to reproduce:
1 Create a new world. I made it creative and superflat
2 Set the Worldspawn new at some new coordinates
3 Go to the End
4 Set your Spawnpoint with /spawnpoint
5 Kill yourself

Note: Your spawn should not be set at the overworld, so that you can respawn arround the Worldspawn
Also, when you do Step 4, be sure, that you are standing *NOT* on the Obsidian Platform

In Screenshot 1, you can see the world right after generating. This is a fresh world.

In Screenshot 2, I teleported myself to 0 0 and set the Worldspawn with /setworldspawn

In screenshot 3, I traveled to the End. I stood not on the Platform as I used /spawnpoint

In screenshot 4, I respawned after killing myself. I spawned not arround 0 0

Seed: 3766956683438476032

• Note, that arround the Worldspawn, I mean values with +10 or -10 blocks. In the screenshot I spawned 100 Blocks away from the Worldspawn.