Playing this game for more than 5 minutes causes incredible frame drop for me. Frames go down to about 11 FPS. Once that happens, exiting won't save the game state anymore. All progress is lost. As you can see in the log files I have optimal specs for this. It's not related to the visual settings - even lowest will always result in the same. Likely this is related to this error being raised in the coroutines in each frame update. It looks to me like there is a problem writing down the serialized data to files (or memory): NullReferenceException: Object reference not set to an instance of an object
  at ylands.Character.SerializeToBinaryImpl (ylands.BinarySerializer bu, ylands.ObjectWriteContext context) [0x00000] in <filename unknown>:0 
  at ylands.Entity.Serialize (ylands.BinarySerializer bu, ylands.ObjectWriteContext context) [0x00000] in <filename unknown>:0 
  at ylands.WorldBlockData+Serialization.Serialize (ylands.WorldBlockData self, ylands.BinarySerializer bs, ylands.ObjectWriteContext context) [0x00000] in <filename unknown>:0 
  at ylands.WorldBlockData.Serialize (ylands.BinarySerializer bs, ylands.ObjectWriteContext context) [0x00000] in <filename unknown>:0 
  at ylands.WorldData+Serialization.SerializeToBinary (ylands.WorldData data, ylands.BinarySerializer bu, ylands.ObjectWriteContext context) [0x00000] in <filename unknown>:0 
  at ylands.WorldData.ToBytes (ylands.ObjectWriteContext context) [0x00000] in <filename unknown>:0 
  at ylands.CommonSaveData.SerializeWorldAndSettings (ylands.WorldData world, ylands.ObjectWriteContext context, Boolean cacheSuppliedObjects) [0x00000] in <filename unknown>:0 
  at ylands.YlandSaveData.SerializeWorldAndSettings (ylands.WorldData world, ylands.ObjectWriteContext context, Boolean cacheSuppliedObjects) [0x00000] in <filename unknown>:0 
  at ylands.YlandSaveData.SerializeGameState (ylands.GameState state, ylands.ObjectWriteContext context) [0x00000] in <filename unknown>:0 
  at ylands.DefaultSessionHostRole.SerializeGameState (ylands.YlandSaveData data, ylands.GameState gamestate) [0x00000] in <filename unknown>:0 
  at ylands.DefaultSessionHostRole+YlandSaveLogic.SerializeState () [0x00000] in <filename unknown>:0 
  at ylands.GameSaver+<SaveCoro>c__Iterator1.MoveNext () [0x00000] in <filename unknown>:0 
  at UnityEngine.SetupCoroutine.InvokeMoveNext (IEnumerator enumerator, IntPtr returnValueAddress) [0x00000] in <filename unknown>:0 
UnityEngine.MonoBehaviour:StartCoroutine_Auto_Internal(IEnumerator)
UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator)
ylands.GameSaver:Save(Boolean, SaveGameCause, Boolean)
ylands.GameSaver:Update() My game version is 0.6.42165. Please fix this ASAP, as the game is NOT PLAYABLE in this state     output_log.txt DxDiag.txt