Teleporting a player above y 20000500 softlocks the player

Expected behavior

Teleporting a player above y 19999999 should not be possible (vanilla maximum altitude)

Observed/Actual behavior

The console will continuously spam moved too quickly with positions below y 0 relative to your altitude above the max limit (https://mclo.gs/G2PtvCS)
and soft-lock the player (unable to move in any way)

Steps/models to reproduce

1. Teleport a player to y 20000500 using API
2. observe the logs

Plugin and Datapack List

pl
[18:39:01 INFO]: ℹ Server Plugins (4):
[18:39:01 INFO]: Paper Plugins:
[18:39:01 INFO]: - PerWorlds, ServiceIO, Tweaks, Worlds

datapack list
[18:39:04 INFO]: There are 3 data pack(s) enabled: [vanilla (built-in)], [file/bukkit (world)], [paper (built-in)]
[18:39:04 INFO]: There are no more data packs available

Paper version

This server is running Paper version 1.21.8-50-main@51706e5 (2025-08-25T02:01:41Z) (Implementing API version 1.21.8-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.8-2-4ed5b66 (MC: 1.21.8)

Other

No response

Start from the server API teleport path and reproduce the case by placing a player at y 20000500. Trace the handling of coordinates above the vanilla maximum altitude; done means the teleport is rejected or safely handled without repeated “moved too quickly” logs or a soft-locked player.