Expected behavior

The EntityTeleportEvent event fires once when an entity teleports, with for example the /minecraft:tp command.

Observed/Actual behavior

The EntityTeleportEvent event fires twice when an entity teleports.

Steps/models to reproduce

I used a plugin called ExecutableEvents that utilizes this event. It allows you to fire commands when one of these events happen. According to the plugin developer, this does indeed use the EntityTeleportEvent event and fires twice.

Plugin and Datapack List

Paper version

[10:31:55 INFO]: Checking version, please wait...
[10:31:55 INFO]: This server is running Paper version 1.21.4-211-main@6ea4202 (2025-03-13T11:49:31Z) (Implementing API version 1.21.4-R0.1-SNAPSHOT)
You are 1 version(s) behind
Download the new version at: https://papermc.io/downloads/paper
Previous version: 1.21.4-187-1d5e5a5 (MC: 1.21.4)

Other

Plugin utilized to find this out: ExecutableEvents by Ssomar

One of the plugin devs shared these screenshots with me: