The bug
When a player dies, an ender pearl thrown before death should become invalid. However, the ender pearl teleports you even after you respawn.
How to reproduce
/gamerule doImmediateRespawn true
Set spawnpoint to somewhere else, away from where the ender pearl will land
Throw out an ender pearl
Before it lands, kill yourself
→ ❌ Notice you're teleported after respawn
Can confirm in 20w48a.