What happens:
Set the world border to a lower value.
Go into the nether and place a nether portal at a location which would place you at overworld coordinates behind the world border.
See how you will instantly die (in survival).
What should happen:
The player should not be allowed to enter a nether portal which kills him due to the world border in the overworld or the world border should reflect the coordinate ratio between overworld and nether.
Linked issues
Comments 2
No. My problem is, that you can place nether portals in the nether at locations that cause a portal to spawn behind the world border in the overworld. This will cause you to immediately die.
E.g. the world border is set to 8999 (overworld). Then you place a portal at X=0 and y=2000 (in the nether) and a new portal is created at let's say y=16000 (overworld). The moment you go through the portal in the nether, you'll die as you are some 7.000 blocks behind the world border. This also means you will lose all your items and experience you had.
Thought this could be fixed by adjusting the world border for all dimensions accordingly. (Change the world border in 1 dimensions and it adjusts the world borders in all dimensions, but by taking the coordinate ratio between those dimensions into account.)
Another possible fix would be to just disable all portals which would lead to a location behind the world border.
Ulraf
Does MC-121997 describe your issue?