Firework effects of a firework rocket are not synchronized with client

[pandier]

Affected Product(s)

SpongeVanilla

Version

1.20.6-11.0.1-RC1778

Operating System

Linux (Fedora 40)

Java Version

openjdk 21.0.3

Plugins/Mods

- Custom plugin (called 'lightshow')

Describe the bug

Whenever FIREWORK_EFFECTS is modified on a firework rocket entity, the data is not synchronized with the client. Modified data can bee seen using the /data command, but the client doesn't show any firework effects.

Reproducing

When using registering the following command:

final Command.Parameterized fireworkCommand = Command.builder()
                .executor(context -> {
                    final ServerPlayer player = context.cause().first(ServerPlayer.class).orElseThrow();
                    final ServerWorld world = player.world();
                    final FireworkRocket rocket = world.createEntity(EntityTypes.FIREWORK_ROCKET, player.position());
                    rocket.offer(Keys.FIREWORK_EFFECTS, List.of(FireworkEffect.builder().color(Color.RED).shape(FireworkShapes.BURST).build()));
                    rocket.offer(Keys.FIREWORK_FLIGHT_MODIFIER, Ticks.of(1));
                    world.spawnEntity(rocket);
                    return CommandResult.success();
                })
                .build()

and then executing the command as a player, the rocket is spawned and flies for a bit, but when it should explode with the specified firework effects, it just disappears instead.

Link to logs

https://paste.gg/p/anonymous/af2f41e0bfec4802904a23312cbcc07d