[1.15.2] Custom Entity doesn't spawn

[RobinCirex]

Hey guys, I'm working on a mod with a water entity, that's supposed to spawn in the water. For some reason, it doesn't spawn when adding a SpawnListEntry. I can spawn it using the eggs or using /summon but it won't spawn naturally. Did they change anything about the spawnlist registry or something? Please help me Here's my code 

@SubscribeEvent
	public void registerEntityType(RegistryEvent.Register<EntityType<?>> event) {
		event.getRegistry().register(AXOLOTL_ENTITY);
		event.getRegistry().register(GOLDEN_AXOLOTL_ENTITY);
		RenderingRegistry.registerEntityRenderingHandler(AXOLOTL_ENTITY, new AxolotlRender.RenderFactory());
		RenderingRegistry.registerEntityRenderingHandler(GOLDEN_AXOLOTL_ENTITY,
				new GoldenAxolotlRender.RenderFactory());
		registerEntityWorldSpawn(AXOLOTL_ENTITY, 1, Biomes.OCEAN, Biomes.WARM_OCEAN, Biomes.DEEP_WARM_OCEAN,
				Biomes.DEEP_OCEAN, Biomes.RIVER, Biomes.LUKEWARM_OCEAN, Biomes.DEEP_LUKEWARM_OCEAN);
		registerEntityWorldSpawn(GOLDEN_AXOLOTL_ENTITY, 2, Biomes.OCEAN, Biomes.WARM_OCEAN, Biomes.DEEP_WARM_OCEAN,
				Biomes.DEEP_OCEAN, Biomes.RIVER);
	}

	public static void registerEntityWorldSpawn(EntityType<?> entity, int weight, Biome... biomes) {
		for (Biome biome : biomes) {
			if (biome != null) {
				biome.getSpawns(entity.getClassification()).add(new SpawnListEntry(entity, weight, 1, 100));
			}
		}
	}

 

[Niprow]

Try the FMLCommonSetupEvent

 

 

QQ.java