Firework can crash creative servers

First go on a single player world with creative and cheats enabled, spawn in some fireworks with long flight time.
/give @p minecraft:fireworks 1 0 {Fireworks:{Flight:110,Explosions:[]}}

Now save your toolbar with C+(Number),
go on a creative server that supports the toolbar, load in the toolbar with X+(Number).
You should now have the firework in your inventory, place down some fireworks and
watch the server crash.

It looks like it can only crash spigot / bukkit servers, but I wanted to report it here and on spigot because it might be used in the future to exploit servers.

An example of this can be a looting/fortune 5000 pickaxe that when kills a mob/mines a block would spawn a ton of entities.