Summary:
Ender pearls can teleport players in spectator mode.
This is a clone of MC-267947 which was fixed in 24w19a and reverted in 24w21a.
Steps to reproduce:
Switch to creative mode and obtain an ender pearl.
Throw the ender pearl in the sky and switch the spectator mode before it hits the ground.
Observed results:
Players are teleported to the ender pearl's location when it lands despite the player who threw it being in spectator mode.
Expected results:
Players would not be teleported to the ender pearl's location when it lands if the player who threw it is in spectator mode.
Can confirm.