- Build an end portal above Y = 75.
- Switch to survival mode.
- Enter the portal.
You spawn safely on the end spawn platform.
You die of fall damage on the end spawn platform.
When traveling through an end portal that is higher than the standard generated end portals i.e. custom made portals the player will receive fall damage based on the y level of the overworld side end portal. this leads to end portals over y level 75 killing unarmoured players and over level 100 killing everyone.
I have included a test world with portals at spawn on multiple y levels for test