here's the log, I'm using 1.12.2 - 4.23.2.2650
[16:35:14] [Client thread/INFO]: Setting user: Compactsquid953
[16:35:16] [Client thread/INFO]: LWJGL Version: 3.1.6 build 14
[16:35:19] [Client thread/INFO]: Reloading ResourceManager: Default
[16:35:20] [Client thread/WARN]: Missing sound for event: minecraft:block.grindstone.use
[16:35:20] [Sound Library Loader/INFO]: Starting up SoundSystem...
[16:35:20] [Thread-2/INFO]: Initializing No Sound
[16:35:20] [Thread-2/INFO]: (Silent Mode)
[16:35:20] [Thread-2/INFO]: OpenAL initialized.
[16:35:21] [Sound Library Loader/INFO]: Preloading sound minecraft:sounds/ambient/underwater/underwater_ambience.ogg
[16:35:21] [Sound Library Loader/INFO]: Sound engine started
[16:35:24] [Client thread/INFO]: Created: 1024x512 textures-atlas
[16:35:25] [Client thread/INFO]: Narrator library for x64 successfully loaded
[16:36:34] [Client thread/WARN]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[16:36:34] [Client thread/WARN]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[16:36:34] [Client thread/WARN]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[16:36:34] [Client thread/WARN]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[16:36:34] [Client thread/WARN]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[16:36:35] [Client thread/INFO]: Loaded 0 recipes
[16:36:35] [Client thread/INFO]: Loaded 0 advancements
[16:36:35] [Server thread/INFO]: Starting integrated minecraft server version 18w50a
[16:36:35] [Server thread/INFO]: Generating keypair
[16:36:35] [Server thread/INFO]: Found new data pack vanilla, loading it automatically
[16:36:35] [Server thread/INFO]: Reloading ResourceManager: Default
[16:36:35] [Server thread/INFO]: Loaded 642 recipes
[16:36:36] [Server thread/INFO]: Loaded 695 advancements
[16:36:38] [Server thread/INFO]: Preparing start region for dimension minecraft:overworld
[16:36:39] [Server thread/INFO]: Preparing spawn area: 2549 | 1409 | 0 | 1 ( 44% 0%)
[16:36:39] [Server thread/INFO]: Preparing spawn area: 2640 | 1352 | 0 | 3 ( 48% 0%)
[16:36:40] [Server thread/INFO]: Preparing spawn area: 2949 | 1306 | 0 | 15 ( 55% 3%)
[16:36:40] [Server thread/INFO]: Preparing spawn area: 3378 | 1190 | 0 | 30 ( 64% 6%)
[16:36:41] [Server thread/INFO]: Preparing spawn area: 3830 | 1068 | 0 | 56 ( 72% 12%)
[16:36:41] [Server thread/INFO]: Preparing spawn area: 4257 | 952 | 0 | 69 ( 77% 15%)
[16:36:42] [Server thread/INFO]: Preparing spawn area: 4708 | 807 | 0 | 93 ( 82% 21%)
[16:36:42] [Server thread/INFO]: Preparing spawn area: 5154 | 805 | 0 | 111 ( 84% 25%)
[16:36:43] [Server thread/INFO]: Preparing spawn area: 5604 | 668 | 0 | 132 ( 88% 29%)
[16:36:43] [Server thread/INFO]: Preparing spawn area: 6098 | 538 | 0 | 150 ( 91% 34%)
[16:36:44] [Server thread/INFO]: Preparing spawn area: 6582 | 518 | 0 | 174 ( 92% 39%)
[16:36:44] [Server thread/INFO]: Preparing spawn area: 7074 | 353 | 0 | 200 ( 95% 45%)
[16:36:45] [Server thread/INFO]: Preparing spawn area: 7537 | 360 | 0 | 225 ( 95% 51%)
[16:36:45] [Server thread/INFO]: Preparing spawn area: 8029 | 185 | 0 | 249 ( 97% 56%)
[16:36:46] [Server thread/INFO]: Preparing spawn area: 8598 | 178 | 0 | 280 ( 97% 63%)
[16:36:46] [Server thread/INFO]: Preparing spawn area: 9052 | 14 | 0 | 297 ( 99% 67%)
[16:36:47] [Server thread/INFO]: Preparing spawn area: 9605 | 16 | 0 | 334 ( 99% 75%)
[16:36:47] [Server thread/INFO]: Preparing spawn area: 9748 | 0 | 0 | 361 (100% 81%)
[16:36:48] [Server thread/INFO]: Preparing spawn area: 9802 | 0 | 0 | 374 (100% 84%)
[16:36:48] [Server thread/INFO]: Preparing spawn area: 9913 | 0 | 0 | 410 (100% 92%)
[16:36:49] [Server thread/INFO]: Preparing spawn area: 10012 | 0 | 0 | 441 (100% 100%)
[16:36:49] [Server thread/INFO]: Preparing spawn area: 10012 | 0 | 0 | 441 (100% 100%)
[16:36:49] [Server thread/INFO]: Time elapsed: 10699 ms
[16:36:50] [Server thread/INFO]: Compactsquid953[local:E:7c851aee] logged in with entity id 444 at (133.5, 70.0, -22.5)
[16:36:50] [Server thread/INFO]: Compactsquid953 joined the game
[16:36:51] [Server thread/INFO]: Saving and pausing game...
[16:36:51] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[16:36:51] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[16:36:51] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[16:36:51] [Client thread/INFO]: Loaded 0 advancements
[16:36:53] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[16:36:53] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[16:36:53] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[16:36:53] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 2335ms or 46 ticks behind
[16:37:01] [Server thread/INFO]: Saving and pausing game...
[16:37:01] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[16:37:01] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[16:37:01] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[16:37:02] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[16:37:02] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[16:37:02] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[16:39:14] [Server thread/INFO]: Saving and pausing game...
[16:39:14] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[16:39:14] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[16:39:14] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[16:39:14] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[16:39:14] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[16:39:14] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[16:39:19] [Server thread/INFO]: Saving and pausing game...
[16:39:19] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[16:39:19] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[16:39:19] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[16:39:19] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[16:39:19] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[16:39:19] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[16:39:53] [Client thread/INFO]: Loaded 2 advancements
[16:41:01] [Client thread/INFO]: Loaded 4 advancements
[16:43:42] [Client thread/INFO]: Loaded 5 advancements
[16:44:33] [Server thread/INFO]: Saving and pausing game...
[16:44:33] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[16:44:33] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[16:44:33] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[16:44:33] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[16:44:33] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[16:44:33] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[18:58:40] [Server thread/INFO]: Saving and pausing game...
[18:58:40] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[18:58:40] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[18:58:40] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[18:58:40] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[18:58:40] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[18:58:40] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[19:03:09] [Client thread/INFO]: Loaded 10 advancements
[19:03:50] [Server thread/INFO]: Saving and pausing game...
[19:03:50] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[19:03:50] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[19:03:50] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[19:03:51] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[19:03:51] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[19:03:51] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[20:46:28] [Server thread/INFO]: Saving and pausing game...
[20:46:28] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[20:46:28] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[20:46:28] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[20:46:29] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[20:46:29] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[20:46:29] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[21:18:57] [Server thread/INFO]: Saving and pausing game...
[21:18:57] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[21:18:57] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[21:18:57] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[21:18:58] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[21:18:58] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[21:18:58] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[21:19:20] [Server thread/INFO]: Saving and pausing game...
[21:19:20] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[21:19:20] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[21:19:20] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[21:19:21] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[21:19:21] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[21:19:21] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[21:19:21] [Server thread/INFO]: Compactsquid953 lost connection: Disconnected
[21:19:21] [Server thread/INFO]: Compactsquid953 left the game
[21:19:21] [Server thread/INFO]: Stopping singleplayer server as player logged out
[21:19:21] [Server thread/INFO]: Stopping server
[21:19:21] [Server thread/INFO]: Saving players
[21:19:21] [Server thread/INFO]: Saving worlds
[21:19:21] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_nether
[21:19:21] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[21:19:21] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:overworld
[21:19:21] [Server thread/INFO]: ThreadedAnvilChunkStorage (New World): All chunks are saved
[21:19:21] [Server thread/INFO]: Saving chunks for level 'New World'/minecraft:the_end
[21:19:21] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[21:19:28] [Client thread/INFO]: Stopping!
[21:19:29] [Client thread/INFO]: SoundSystem shutting down...
[21:19:29] [Client thread/INFO]: SoundSystem Author: Paul Lamb, www.paulscode.com