Ars Nouveau

LOOT_PARAMS is holding the fake player which holds server.
WeakReference don't make any diff on this case due to being stuck on LOOT_PARAMS.

Ars-Nouveau/src/main/java/com/hollingsworth/arsnouveau/api/registry/AlakarkinosConversionRegistry.java

Lines 71 to 78 in 7380dbf

    
           public static void initLootParams(ServerLevel level) { 
        
               ANFakePlayer player = ANFakePlayer.getPlayer(level); 
        
               LOOT_PARAMS = new LootParams.Builder(level) 
        
                       .withParameter(LootContextParams.ORIGIN, BlockPos.ZERO.getCenter()) 
        
                       .withLuck(1.0f) 
        
                       .withParameter(LootContextParams.THIS_ENTITY, player) 
        
                       .create(LootContextParamSets.CHEST); 
        
           }

You might want to add some sort of clean up strategy to set LOOT_PARAMS to null, maybe at Server Stopped event, or if you want to be very accurate, at Level Unload (server side) and compare the LOOT_PARAMS level with the one being unloaded, and nullify it.

	public static void initLootParams(ServerLevel level) {
	ANFakePlayer player = ANFakePlayer.getPlayer(level);
	LOOT_PARAMS = new LootParams.Builder(level)
	.withParameter(LootContextParams.ORIGIN, BlockPos.ZERO.getCenter())
	.withLuck(1.0f)
	.withParameter(LootContextParams.THIS_ENTITY, player)
	.create(LootContextParamSets.CHEST);
	}

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