You get kicked if you fly with an elytra with fireworks or a riptide trident straight up or down and you get a message ''Invalid move player packet received'' but if you fly in the end/nether you will crash instead of a kick.
mariohessel lost connection: Invalid move player packet received
19:55:13 net.minecraft.server.MinecraftServer mariohessel left the game
19:55:13 qx Stopping singleplayer server as player logged out
19:55:13 gd handleDisconnection() called twice
19:55:14 net.minecraft.server.MinecraftServer Stopping server
19:55:14 net.minecraft.server.MinecraftServer Saving players
19:55:14 net.minecraft.server.MinecraftServer Saving worlds
19:55:14 net.minecraft.server.MinecraftServer Saving chunks for level 'Copy of 1.13 generate test'/overworld
19:55:14 net.minecraft.server.MinecraftServer Saving chunks for level 'Copy of 1.13 generate test'/the_nether
19:55:14 net.minecraft.server.MinecraftServer Saving chunks for level 'Copy of 1.13 generate test'/the_end
19:55:23 bmh Unreported exception thrown!
java.lang.StackOverflowError
at bmy.b(SourceFile:684)
at bmy.d(SourceFile:615)
at bmy.d(SourceFile:617)
at bmy.d(SourceFile:617)
at bmy.d(SourceFile:617)
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is duplicated by 72
relates to 2
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Comments 26

Confirmed for 17w50a.
You don't even need a firework to trigger this bug. Just look straight up while flying the elytra and you'll lose the connection to the internal server as soon as you start falling.
Keeps happening to me as well! 😞
This also seem to happen when firework boosting out from swimming animation.
BTW, a way I've found to reliably trigger it quickly is get flying, and spam rockets while "snapping" your view up and down quickly.
confirmed for 18w14b
also: when i joined my world again all my effects were gone
EDIT: this happed a second time to me and now i cant join my world anymore
it crashes after about 0.5 - 1 second everytime when i join the world
stef its already updated 😛
@unknown it got added after they commented.
Yeah I did that Becasue I noticed it was not saved last time.
This is the same problem I am having with the newest snapshot, 17w48a.
[media]It happened twice, right after one another.
This is the important part of the game log: