Possible travel exploit - enderpearl stasis

Unloading an enderpearl inside an enderpearl stasis machine (sometimes called an enderporter or ender porter) (e.g https://www.youtube.com/watch?v=zKipDINSYLI), or throwing an ender pearl into an unloaded chunk, allows for players to teleport back to that location from any distance in that dimension once that stasis machine is turned off, or chunk is loaded by another player or alt account.

Is this legitimate vanilla teleportation? or is it an unintended glitch that should be considered an exploit.