Dimensions failing to load in Multiplayer

[DanyGames2014]

Issue 1:
When I register a dimension on a newly created server world, meaning all dimensions have to be generated, the server freezes on [INFO] Preparing level "world" and never recovers

@EventListener
public void registerDimension(DimensionRegistryEvent event) {
    event.registry.register(NAMESPACE.id("tropics"), new DimensionContainer<>(TropicsDimension::new));
}

Issue 2:
The helper method on DimensionRegistryEvent fails to register the dimension

@EventListener
public void registerDimension(DimensionRegistryEvent event) {
      // This doesn't work
      event.register(NAMESPACE.id("tropics"), new DimensionContainer<>(TropicsDimension::new));
      
      // This does work
      event.registry.register(NAMESPACE.id("tropics"), new DimensionContainer<>(TropicsDimension::new));
}