/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.