The Bug
When dying and respawing the player will respawn at random locations near the world spawnpoint but not at the world spawnpoint.

Replicate

• Spawn in a new world
• /kill yourself
• Notice how you spawn in a different location from the base world spawn
• do /setworldspawn
• /kill
• Notice how you spawn at different location from the world spawn

Did discover while testing MC-165963